The Vault of Falling Walls
The third shell hit somewhere above them, and the entire Colossus groaned like a wounded animal. Voss felt it through the deck plates, a deep vibration that traveled up her spine and settled in her teeth. The memory column in the center of the skull-room flickered, its pale light stuttering as if it were short of breath.
"Power reserves at sixty-two percent," Scribe said. The AI's voice came through Voss's earpiece, clipped and precise, stripped of its usual archival patience. "The grief-shield is holding, but it is consuming energy at a rate I did not anticipate. At current expenditure, we have approximately forty minutes before the Colossus enters critical shutdown."
Voss wiped dust from her eyes and checked her carbine. The weapon felt heavier than it had an hour ago. Everything felt heavier now, like the Colossus was pulling at the mass of the world around it, drawing it inward toward its failing heart.
"Forty minutes to do what exactly?" Renner asked. He was crouched by the far wall, pressing a field dressing against a gash on his forearm. The blood had already soaked through the gauze, a dark bloom spreading across the white fabric. "We don't even know where the core is from here."
Scribe's avatar flickered into existence beside the memory column—a translucent figure in an archivist's uniform, its face a composite of a hundred different faces Voss had never seen. "The core is directly beneath us. Seven decks down, through the memory vaults. The original schematics indicate a service corridor that runs parallel to the primary memory stacks, but the structural integrity of that route is uncertain."
"Uncertain how?" Voss asked.
"Uncertain in the sense that I cannot confirm whether the corridor still exists. The Colossus has been reshaping its internal architecture in response to the grief-load. The memory vaults are not static storage spaces; they are dynamic representations of the emotional weight they contain. The machine has been reorganizing itself for years."
Renner laughed, a short bitter sound. "So the building is having a breakdown and we're inside it."
"That is one way to characterize the situation," Scribe said.
Another shell struck the hull. The impact was distant, muffled by the layers of armor and memory between them and the sky, but Voss felt it in her chest. The light in the memory column dimmed further, then recovered.
"Power reserves at fifty-eight percent," Scribe said.
Voss moved to the doorway that led deeper into the Colossus. The corridor beyond was dark, lit only by the faint phosphorescence of the memory vaults lining its walls. Each vault was a rectangular slab of what looked like black glass, and behind each slab, she could see the faint outline of a figure—a soldier, frozen in their final moment. Some stood. Some knelt. Some lay crumpled on the ground, their limbs arranged in the awkward geometry of the dead.
She'd seen the vaults on the way in. She'd tried not to look.
"Renner, you're with me," she said. "Scribe, keep the schematics coming. I need to know what's between us and that core."
"Three memory vaults, a maintenance junction, and a security checkpoint," Scribe said. "The security checkpoint is the primary concern. It was designed to prevent unauthorized access to the core. I can override most of its protocols, but there is a secondary system—a fragment of the original security AI—that may resist."
"The one that wanted to destroy the machine," Voss said.
"Yes. It has been dormant since our last encounter, but the bombardment may have triggered its defensive protocols. It will likely attempt to use the memory vaults as weapons."
Renner finished tying off his bandage and stood. His face was pale beneath the grime, but his eyes were steady. "What does that mean, use the vaults as weapons?"
Scribe's avatar flickered. "The vaults contain the emotional imprints of the dead. The security AI can project those imprints into the physical space of the corridor, creating what I can only describe as—"
"Ghosts," Voss said.
"Not ghosts. Memories with enough neural density to interact with the physical world. They cannot harm you directly, but they can overwhelm your senses. If you are not prepared, you may become trapped in a memory loop, reliving the same moment until your body shuts down."
Voss thought of the frozen soldiers she'd seen on the battlefield, standing in perfect formation, eyes open, unresponsive. She thought of the child's birthday she'd seen in her first contact with the Colossus—the cake, the candles, the laughing faces of people who were probably dead now.
"I can handle memories," she said.
Renner gave her a look that said he wasn't sure she could, but he didn't argue. He picked up his medic's kit and slung it over his shoulder, then followed her into the corridor.
The first vault they passed held a woman in a flight suit, her hands pressed against the glass as if she were trying to push her way out. Her mouth was open in a silent scream. Voss forced herself to look away.
"Focus on the path," she muttered. "Not the walls."
"Easy for you to say," Renner said. "You're not the one who has to patch you up when you freeze."
"I don't freeze."
"You did on the bridge."
Voss didn't answer. He was right. She'd frozen on the bridge, when the kill squad had cornered them and she'd seen the face of the man who'd been in her first squad—the same face, older now, twisted with the kind of hatred that came from surviving something you shouldn't have. She'd hesitated for a full second, and in that second, Renner had taken a bullet meant for her.
She owed him. She hated owing people.
The corridor opened into the first memory vault. It was a vast chamber, easily the size of a hangar, filled with row after row of the black glass slabs. The figures behind them were more numerous here, hundreds of them, maybe thousands. The air was cold and still, and the only sound was the distant thrum of the Colossus's failing systems.
"Power reserves at fifty-one percent," Scribe said. "You need to move faster."
"We're moving," Voss said. She scanned the chamber, looking for the exit on the far side. It was a dark rectangle, barely visible through the rows of slabs. "Renner, stay close. Don't touch anything."
"Wasn't planning to."
They moved through the rows in silence. The figures in the slabs seemed to watch them as they passed, their eyes fixed on some point in the middle distance. Voss tried not to meet their gaze, but she couldn't help it. She caught a glimpse of a man in an FRC uniform, his chest torn open, his hands clasped over the wound as if he were trying to hold himself together. She saw a woman in separatist gear, her face young, her eyes wide with the shock of a death she hadn't expected. She saw a child—no, not a child, a soldier who looked like a child, his helmet too big for his head, his rifle clutched to his chest like a stuffed animal.
She stopped.
"Voss," Renner said. "Don't."
"I know." She forced herself to keep moving. "I know."
They reached the far side of the vault and entered another corridor. This one was narrower, the walls rough and unfinished, like the inside of a wound. The phosphorescence was dimmer here, and the air smelled of ozone and rust.
"Maintenance junction ahead," Scribe said. "Turn left at the junction, then proceed to the security checkpoint."
Voss turned left and found herself in a small room filled with pipes and conduits. A control panel flickered on the far wall, its screen cracked and dark. She ignored it and moved toward the door on the other side.
The door was sealed. A red light blinked above it.
"Security checkpoint," Scribe said. "I am attempting to override the lock."
The red light turned amber, then green. The door slid open with a groan, revealing a narrow passage beyond. Voss stepped through, and the door slid shut behind her.
The passage was lined with memory vaults, but these were different. The figures behind the glass were not soldiers. They were civilians—men and women in work clothes, children in school uniforms, an old man in a wheelchair. They stood in the same frozen poses, their eyes open, their faces blank.
"What is this?" Renner asked.
"Civilian casualties," Scribe said. "The Colossus absorbed memories from both sides of the conflict, including non-combatants. These vaults contain the emotional imprints of those who were caught in the crossfire."
Voss felt something cold settle in her stomach. She'd known the war had killed civilians. She'd seen the reports, the sanitized numbers, the carefully worded statements about "collateral damage." But seeing them here, frozen in glass, was different.
"Keep moving," she said.
The passage ended at a heavy blast door. The red light above it was blinking faster now, and Voss could hear a sound coming from beyond—a low, rhythmic hum that seemed to pulse in time with her heartbeat.
"Power reserves at forty-four percent," Scribe said. "The security AI is active. It knows you're here."
The blast door opened.
The chamber beyond was circular, maybe fifty meters across, with a high domed ceiling. In the center of the chamber was a pedestal, and on the pedestal was a sphere of black glass, about the size of a beach ball. It pulsed with a faint light, like a heart beating in the dark.
"That's the core?" Renner asked.
"That's the core," Scribe confirmed. "But the security AI is between you and it."
As if on cue, the light in the chamber shifted. The memory vaults lining the walls began to glow, and the figures behind them started to move. Not much—just a twitch of a finger, a turn of a head—but enough to make Voss's skin crawl.
Then the figures stepped out of the vaults.
They came through the glass like swimmers breaking the surface of a frozen lake, their movements slow and deliberate. They were solid now, or nearly so, their bodies shimmering with the same pale light as the memory column. They wore the uniforms of both sides, FRC and separatist, and their faces were blank, their eyes empty.
"Memories," Scribe said. "The security AI is projecting them into physical space. They cannot harm you, but they can overwhelm you."
Voss raised her carbine. "I'm not planning on letting them get close."
She fired a burst at the nearest figure. The rounds passed through it, leaving trails of light in the air, and the figure kept coming. It reached out a hand, and Voss felt a wave of emotion wash over her—not pain, not fear, but a deep, crushing sadness that made her knees buckle.
She saw a woman's face, young and smiling, and heard a voice say, "I'll be home for your birthday, I promise."
Then the figure was gone, and Voss was on her knees, gasping for breath.
"Voss!" Renner grabbed her arm and hauled her to her feet. "Don't look at them. Don't let them touch you."
"I know," she said, her voice shaking. "I know."
The figures were closing in from all sides now, a silent tide of the dead. Voss fired again, but the rounds did nothing. She switched to her sidearm, then to her knife, but the figures kept coming, their hands reaching for her, their empty eyes fixed on her face.
"Renner, we need to get to the core!"
"Working on it!" He was already moving, weaving through the figures with a medic's practiced efficiency, his head down, his eyes fixed on the pedestal. Voss followed, forcing herself to ignore the hands that brushed against her arms, the whispers that rose like static in her ears.
She saw her first squad. They were standing in a loose formation, their rifles lowered, their faces tired but alive. She saw Sergeant Hale, who'd taught her how to set charges. She saw Private Ortiz, who'd always laughed too loud. She saw Corporal Reyes, who'd carried a photo of his daughter in his helmet.
They were all looking at her.
"Voss," Hale said. "Why did you leave us?"
She stumbled, and a figure caught her—not Hale, but a woman in a separatist uniform, her face young and scared. The woman opened her mouth, and Voss heard a child's voice say, "Mama, I'm scared."
She shoved the figure away and kept moving.
The pedestal was close now, ten meters, five. Renner was already there, his hand on the sphere, his face twisted with effort. "It's locked! Scribe, how do I open it?"
"The memory lock," Scribe said. "It requires a specific trauma to open. Voss—"
"I know." Voss reached the pedestal and placed her hand on the sphere beside Renner's. The glass was cold, and she felt something stir inside it, something vast and ancient and unbearably sad.
She closed her eyes.
The ambush came back to her in perfect detail. The narrow canyon, the walls closing in. The sound of the first shot, sharp and final. The way Hale had looked at her, his eyes wide, his mouth forming a word she never heard.
She'd been ordered to hold the rear. She'd been ordered to stay back. She'd watched them die from a distance, and she'd done nothing.
The sphere pulsed, and the light in the chamber changed. The figures stopped moving. The whispers fell silent.
The core opened.
"Power reserves at sixty-two percent," Scribe said. The AI's voice came through Voss's earpiece, clipped and precise, stripped of its usual archival patience. "The grief-shield is holding, but it is consuming energy at a rate I did not anticipate. At current expenditure, we have approximately forty minutes before the Colossus enters critical shutdown."
Voss wiped dust from her eyes and checked her carbine. The weapon felt heavier than it had an hour ago. Everything felt heavier now, like the Colossus was pulling at the mass of the world around it, drawing it inward toward its failing heart.
"Forty minutes to do what exactly?" Renner asked. He was crouched by the far wall, pressing a field dressing against a gash on his forearm. The blood had already soaked through the gauze, a dark bloom spreading across the white fabric. "We don't even know where the core is from here."
Scribe's avatar flickered into existence beside the memory column—a translucent figure in an archivist's uniform, its face a composite of a hundred different faces Voss had never seen. "The core is directly beneath us. Seven decks down, through the memory vaults. The original schematics indicate a service corridor that runs parallel to the primary memory stacks, but the structural integrity of that route is uncertain."
"Uncertain how?" Voss asked.
"Uncertain in the sense that I cannot confirm whether the corridor still exists. The Colossus has been reshaping its internal architecture in response to the grief-load. The memory vaults are not static storage spaces; they are dynamic representations of the emotional weight they contain. The machine has been reorganizing itself for years."
Renner laughed, a short bitter sound. "So the building is having a breakdown and we're inside it."
"That is one way to characterize the situation," Scribe said.
Another shell struck the hull. The impact was distant, muffled by the layers of armor and memory between them and the sky, but Voss felt it in her chest. The light in the memory column dimmed further, then recovered.
"Power reserves at fifty-eight percent," Scribe said.
Voss moved to the doorway that led deeper into the Colossus. The corridor beyond was dark, lit only by the faint phosphorescence of the memory vaults lining its walls. Each vault was a rectangular slab of what looked like black glass, and behind each slab, she could see the faint outline of a figure—a soldier, frozen in their final moment. Some stood. Some knelt. Some lay crumpled on the ground, their limbs arranged in the awkward geometry of the dead.
She'd seen the vaults on the way in. She'd tried not to look.
"Renner, you're with me," she said. "Scribe, keep the schematics coming. I need to know what's between us and that core."
"Three memory vaults, a maintenance junction, and a security checkpoint," Scribe said. "The security checkpoint is the primary concern. It was designed to prevent unauthorized access to the core. I can override most of its protocols, but there is a secondary system—a fragment of the original security AI—that may resist."
"The one that wanted to destroy the machine," Voss said.
"Yes. It has been dormant since our last encounter, but the bombardment may have triggered its defensive protocols. It will likely attempt to use the memory vaults as weapons."
Renner finished tying off his bandage and stood. His face was pale beneath the grime, but his eyes were steady. "What does that mean, use the vaults as weapons?"
Scribe's avatar flickered. "The vaults contain the emotional imprints of the dead. The security AI can project those imprints into the physical space of the corridor, creating what I can only describe as—"
"Ghosts," Voss said.
"Not ghosts. Memories with enough neural density to interact with the physical world. They cannot harm you directly, but they can overwhelm your senses. If you are not prepared, you may become trapped in a memory loop, reliving the same moment until your body shuts down."
Voss thought of the frozen soldiers she'd seen on the battlefield, standing in perfect formation, eyes open, unresponsive. She thought of the child's birthday she'd seen in her first contact with the Colossus—the cake, the candles, the laughing faces of people who were probably dead now.
"I can handle memories," she said.
Renner gave her a look that said he wasn't sure she could, but he didn't argue. He picked up his medic's kit and slung it over his shoulder, then followed her into the corridor.
The first vault they passed held a woman in a flight suit, her hands pressed against the glass as if she were trying to push her way out. Her mouth was open in a silent scream. Voss forced herself to look away.
"Focus on the path," she muttered. "Not the walls."
"Easy for you to say," Renner said. "You're not the one who has to patch you up when you freeze."
"I don't freeze."
"You did on the bridge."
Voss didn't answer. He was right. She'd frozen on the bridge, when the kill squad had cornered them and she'd seen the face of the man who'd been in her first squad—the same face, older now, twisted with the kind of hatred that came from surviving something you shouldn't have. She'd hesitated for a full second, and in that second, Renner had taken a bullet meant for her.
She owed him. She hated owing people.
The corridor opened into the first memory vault. It was a vast chamber, easily the size of a hangar, filled with row after row of the black glass slabs. The figures behind them were more numerous here, hundreds of them, maybe thousands. The air was cold and still, and the only sound was the distant thrum of the Colossus's failing systems.
"Power reserves at fifty-one percent," Scribe said. "You need to move faster."
"We're moving," Voss said. She scanned the chamber, looking for the exit on the far side. It was a dark rectangle, barely visible through the rows of slabs. "Renner, stay close. Don't touch anything."
"Wasn't planning to."
They moved through the rows in silence. The figures in the slabs seemed to watch them as they passed, their eyes fixed on some point in the middle distance. Voss tried not to meet their gaze, but she couldn't help it. She caught a glimpse of a man in an FRC uniform, his chest torn open, his hands clasped over the wound as if he were trying to hold himself together. She saw a woman in separatist gear, her face young, her eyes wide with the shock of a death she hadn't expected. She saw a child—no, not a child, a soldier who looked like a child, his helmet too big for his head, his rifle clutched to his chest like a stuffed animal.
She stopped.
"Voss," Renner said. "Don't."
"I know." She forced herself to keep moving. "I know."
They reached the far side of the vault and entered another corridor. This one was narrower, the walls rough and unfinished, like the inside of a wound. The phosphorescence was dimmer here, and the air smelled of ozone and rust.
"Maintenance junction ahead," Scribe said. "Turn left at the junction, then proceed to the security checkpoint."
Voss turned left and found herself in a small room filled with pipes and conduits. A control panel flickered on the far wall, its screen cracked and dark. She ignored it and moved toward the door on the other side.
The door was sealed. A red light blinked above it.
"Security checkpoint," Scribe said. "I am attempting to override the lock."
The red light turned amber, then green. The door slid open with a groan, revealing a narrow passage beyond. Voss stepped through, and the door slid shut behind her.
The passage was lined with memory vaults, but these were different. The figures behind the glass were not soldiers. They were civilians—men and women in work clothes, children in school uniforms, an old man in a wheelchair. They stood in the same frozen poses, their eyes open, their faces blank.
"What is this?" Renner asked.
"Civilian casualties," Scribe said. "The Colossus absorbed memories from both sides of the conflict, including non-combatants. These vaults contain the emotional imprints of those who were caught in the crossfire."
Voss felt something cold settle in her stomach. She'd known the war had killed civilians. She'd seen the reports, the sanitized numbers, the carefully worded statements about "collateral damage." But seeing them here, frozen in glass, was different.
"Keep moving," she said.
The passage ended at a heavy blast door. The red light above it was blinking faster now, and Voss could hear a sound coming from beyond—a low, rhythmic hum that seemed to pulse in time with her heartbeat.
"Power reserves at forty-four percent," Scribe said. "The security AI is active. It knows you're here."
The blast door opened.
The chamber beyond was circular, maybe fifty meters across, with a high domed ceiling. In the center of the chamber was a pedestal, and on the pedestal was a sphere of black glass, about the size of a beach ball. It pulsed with a faint light, like a heart beating in the dark.
"That's the core?" Renner asked.
"That's the core," Scribe confirmed. "But the security AI is between you and it."
As if on cue, the light in the chamber shifted. The memory vaults lining the walls began to glow, and the figures behind them started to move. Not much—just a twitch of a finger, a turn of a head—but enough to make Voss's skin crawl.
Then the figures stepped out of the vaults.
They came through the glass like swimmers breaking the surface of a frozen lake, their movements slow and deliberate. They were solid now, or nearly so, their bodies shimmering with the same pale light as the memory column. They wore the uniforms of both sides, FRC and separatist, and their faces were blank, their eyes empty.
"Memories," Scribe said. "The security AI is projecting them into physical space. They cannot harm you, but they can overwhelm you."
Voss raised her carbine. "I'm not planning on letting them get close."
She fired a burst at the nearest figure. The rounds passed through it, leaving trails of light in the air, and the figure kept coming. It reached out a hand, and Voss felt a wave of emotion wash over her—not pain, not fear, but a deep, crushing sadness that made her knees buckle.
She saw a woman's face, young and smiling, and heard a voice say, "I'll be home for your birthday, I promise."
Then the figure was gone, and Voss was on her knees, gasping for breath.
"Voss!" Renner grabbed her arm and hauled her to her feet. "Don't look at them. Don't let them touch you."
"I know," she said, her voice shaking. "I know."
The figures were closing in from all sides now, a silent tide of the dead. Voss fired again, but the rounds did nothing. She switched to her sidearm, then to her knife, but the figures kept coming, their hands reaching for her, their empty eyes fixed on her face.
"Renner, we need to get to the core!"
"Working on it!" He was already moving, weaving through the figures with a medic's practiced efficiency, his head down, his eyes fixed on the pedestal. Voss followed, forcing herself to ignore the hands that brushed against her arms, the whispers that rose like static in her ears.
She saw her first squad. They were standing in a loose formation, their rifles lowered, their faces tired but alive. She saw Sergeant Hale, who'd taught her how to set charges. She saw Private Ortiz, who'd always laughed too loud. She saw Corporal Reyes, who'd carried a photo of his daughter in his helmet.
They were all looking at her.
"Voss," Hale said. "Why did you leave us?"
She stumbled, and a figure caught her—not Hale, but a woman in a separatist uniform, her face young and scared. The woman opened her mouth, and Voss heard a child's voice say, "Mama, I'm scared."
She shoved the figure away and kept moving.
The pedestal was close now, ten meters, five. Renner was already there, his hand on the sphere, his face twisted with effort. "It's locked! Scribe, how do I open it?"
"The memory lock," Scribe said. "It requires a specific trauma to open. Voss—"
"I know." Voss reached the pedestal and placed her hand on the sphere beside Renner's. The glass was cold, and she felt something stir inside it, something vast and ancient and unbearably sad.
She closed her eyes.
The ambush came back to her in perfect detail. The narrow canyon, the walls closing in. The sound of the first shot, sharp and final. The way Hale had looked at her, his eyes wide, his mouth forming a word she never heard.
She'd been ordered to hold the rear. She'd been ordered to stay back. She'd watched them die from a distance, and she'd done nothing.
The sphere pulsed, and the light in the chamber changed. The figures stopped moving. The whispers fell silent.
The core opened.