The movie didn't start with the Lionsgate logo. Instead, it opened on a static-filled shot of a dark hallway. The audio wasn't the "dual" language track promised in the filename; it was a rhythmic, wet thumping, like a heart beating inside a metal drum.

As Elias watched, he realized the "hallway" was actually his own apartment building. The camera moved with a jerky, handheld precision, turning a corner to reveal his own front door.

On the surface, it was just a standard high-definition rip of a movie about exorcism. But when Elias checked the file size, his pulse quickened. A 1080p movie should be roughly 2 to 4 gigabytes. This file was 666 megabytes—exactly. He clicked play.