After staying late to work overtime, Lee Gi-Yun stumbles upon his boss, Jeong Yi-Tae, masturbating at a coworker's desk. Horrified, he tries to leave, but a disembodied voice urges him to stay. When Gi-Yun tries to record Yi-Tae’s depravity, he is caught, and something about his boss seems disturbingly off. From that moment, Gi-Yun is pulled into a...