0gzjpgixd3hby6revi1zw_720p.mp4

The file 0gzjpgixd3hby6revi1zw_720p.mp4 suddenly vanished from his folder. The media player crashed to a black screen. In the reflection of his monitor, Elias saw the blue door of his office—which he knew he had locked—slowly, silently swing open.

On screen, the camera glided up the driveway. It didn’t stop at the door. It rose, tilting upward to the second-floor window. The window of the room Elias was sitting in right now.

The notification appeared at 3:14 AM. No sender, no subject line, just a single attachment: 0gzjpgixd3hby6revi1zw_720p.mp4.