In the middle of the night, a taxi driver picks up a woman on an empty street. By the time he arrives at her destination, she's nowhere to be seen.

Sae-rom livestreams a virtual housewarming party with a spooky surprise for her viewers. But when the camera turns off, the real host takes over.

No matter how much she tries, she can't outrun a creature on the prowl. No matter how long she runs, she can't escape the dark walls of the school.