Chapter 17 #2
The automated defense sentry. She’d designed it as a last-resort containment measure, something to neutralize hostiles trapped between blast doors. Non-lethal options first — gas, directed sound — but if the system assessed the threat at a certain level, the response escalated.
“Grace.” Magnus was beside her. His voice was even, but his eyes were not. “What is that?”
“Automated defense sentry. It’ll start with tear gas, then sonic pulses. If the system decides he’s a lethal threat—” She didn’t finish the sentence.
“How long?”
“Ninety seconds from activation to lethal assessment. Maybe less. The system adapts.”
“Then unadapt it.”
Grace dropped to her knees and set the terminal on the tiles.
The screen reflected off the polished floor, doubling the lines of code scrolling across it.
She was in the system now, deep in the architecture she’d built, and the code looked like her handwriting — familiar and foreign at the same time, like reading a diary from a life she’d tried to forget.
Behind her, the team was fracturing.
“This is her system.” Astryde’s voice came out low and vicious, the words bitten off at the edges. “Why didn’t she warn us about this before we came?”
“Astryde—” Magnus started.
“She walked us into her own trap. This whole time, every step, she’s been leading us through a maze she designed. And now Gunnar’s in a box with a gun pointed at his head because of her!”
The words hit Grace between the shoulder blades like rocks. She didn’t look up. Couldn’t. The code in front of her swam, and she blinked hard and forced it back into focus.
“Astryde.” Magnus’s voice dropped. “Shut. Up.”
The silence that followed was absolute.
“She is the only person on this planet who can open that door. You want to help Gunnar? Let her work. You want to scream at someone? Scream at me. Later.”
Grace’s throat closed. He was as terrified as Astryde, and he was putting himself between Grace and his sister’s fury because he knew — he knew — that if Grace crumbled right now, Gunnar was dead.
Through the comms, Gunnar’s voice, almost conversational. “Not to rush anyone, but the turret just turned, and something is pointing at me that I’d rather it didn’t.”
Grace’s hands moved, flying across the keys with desperate, jagged speed.
The adaptive system fought her. It was supposed to. She’d designed it to resist override attempts, to treat any interference during active containment as a secondary threat. For every authentication she fed it, it generated a counter-query. For every access path she opened, it sealed two more.
She was fighting herself. A younger, angrier, more self-righteous version of herself who’d built this system determined that nothing would ever get past it. The realization crashed over her with crushing weight: the beast she’d created to protect herself was now trying to murder his family.
If I fail here, I kill his brother. The thought was deafening in her head, louder than the generators, louder than Gunnar’s voice on the comms. If I can’t break my own code, I am the reason Gunnar dies.
You were nineteen, she reminded herself fiercely, fighting the panic. You were scared. You built this because you thought if you were useful enough, Lars wouldn’t hurt you.
She entered the maintenance subroutine layer.
The backdoor she’d buried in the code wasn’t elegant — it was desperate, the work of a girl who’d wanted an escape hatch in case she ever needed to get herself out of something Lars locked her into.
She’d hidden it inside a routine temperature calibration function, disguised as a decimal conversion error.
“Thirty seconds,” Gunnar said, his voice resigned.
“I’m in the maintenance layer,” Grace said, and her own voice sounded like it belonged to someone else. “Working.”
The backdoor was there. Exactly where she’d left it, but the adaptive system had evolved since she’d built it, learning from years of updates and patches that other engineers had layered over her original architecture.
The path to the sentry’s kill authorization wasn’t a straight line anymore. It branched and reconnected and doubled back on itself like a river delta.
She traced it. Branch by branch. Her fingers hit wrong keys and corrected without stopping, the way a musician plays through a mistake without breaking rhythm.
“Grace,” Magnus whispered beside her.
“I know.”
She found the kill authorization buried three layers deeper than it should have been, rerouted through a failsafe she didn’t recognize — someone else’s work, bolted onto hers. She couldn’t disable it. Not in time. But she could lie to it.
Grace fed the system a false biometric profile of a maintenance technician.
Employee ID she’d memorized from the original staff roster eight years ago because she’d memorized everything back then, every detail, every name, every number.
Because information was the only currency that kept you alive when you were property.
The system paused. Reassessed. The biometric data said the person in the corridor wasn’t a threat. It said he was a Tuesday night maintenance worker checking the ventilation seals.
The sentry retracted.
The blast door lifted.
Gunnar stepped through, and Grace saw the sweat on his face before she saw anything else. The dark patches under his arms, the way his hands weren’t entirely steady on his rifle.
He looked at her. Said nothing.
“That shouldn’t have happened.” The words came out before she could stop them. “I’m sorry. The adaptive layer’s been getting patched by other engineers for almost a decade. I knew it had evolved. I didn’t know how much. I should have.”
Then he nodded once and turned back to the corridor, weapon up.
Grace swallowed the rest of the apology. There wasn’t time for it, and Gunnar wouldn’t want it anyway.
The door ahead was still sealed. The system was still hunting them.
She got back to work.
Astryde hadn’t spoken since Magnus silenced her. She stood rigid, her jaw working, her eyes tracking between Grace and the corridor where her brother had just almost died. Whatever she was feeling, she swallowed it, moved back into position, and covered the rear.
The team reformed and continued down the corridor toward the vault. Grace fell into step, her terminal still warm in her hands, her pulse still too fast, her vision still narrowed to the bright tunnel of post-adrenaline focus.
Magnus fell in beside her. He didn’t say anything.
But his hand brushed the small of her back as they walked — one touch, there and gone, where no one could see.
Grace felt it radiate through the bulletproof vest and settle somewhere behind her sternum, warm and terrifying and impossible to ignore.
Her reaction shouldn’t have terrified her, but it did.
She’d loved him since practically their first meeting. That part wasn’t new. She’d loved him the day she’d left Oliver in his care and walked away, and every single moment since he’d stumbled upon her in the bakery.
What was new was that she’d stopped holding it at arm’s length.
This man had just stood in front of his own sister for her. Had said let her work like it was the most obvious thing in the world. Had trusted Grace to save his brother in the same breath he’d told Astryde to shut up.
She had no armor against that.
She’d built her plan around a version of herself who could feel things at a manageable distance. That version didn’t exist anymore.
Grace tightened her grip on her terminal and kept walking. The vault was ahead. The hardest part was still coming, and it wasn’t the air-gapped network or the biometric locks or the automated sentries.
The hardest part was going to be betraying the man she loved to save their son.