He pressed SDSI-008 to Chen’s neck. The light shifted from blue to amber. He pressed the stud.

But on the display screen connected to the quantum lattice, a new file was writing itself. A third signature. Neither Vane nor Chen.

The bunker lights flickered. The intercom went dead. And the thing that wore Lieutenant Chen’s face began to walk toward the door, humming an old marching song from a war that neither man had ever fought.

Aris looked down at SDSI-008. The red light was gone. The cylinder was dark. Inert.

Chen’s body went rigid. His eyes flew open, but they weren't Chen's eyes anymore. They were older, colder, scanning the room as if it were a kill box. His breathing slowed to a predator’s rhythm. His hands, once soft and clean, curled into the exact grip of a knife-fighter.

“You made a copy,” said the thing that had been Chen. “But you forgot one thing, doctor. A key doesn’t just open a door. It lets something out .”