Elias turned around. Behind him, the door to his office was slightly ajar. Hanging on the outside was the plastic room number of his apartment: 1516.

It wasn't a filename. It was a mirror image of a room number: 1516 .

The cursor began to move on its own, hovering over the file. Then, the speakers crackled with the sound of a door handle turning—not in the digital world, but from the hallway directly behind him. Elias didn't click the file. He didn't have to. The archive had already extracted itself into his reality.

He looked back at the screen. The file D6151.rar was gone. In its place was a new folder named EXIT.exe .

"The subject has reached the perimeter," it read. "He is looking at the screen now. He is wondering about the filename."