The Man From the Basement Is Locked in My Room

Jeong Gae-seok has dedicated his life to maintaining a perfect sense of normalcy. However, his carefully constructed routine begins to crumble due to mysterious thumping noises echoing from the apartment below every night. Driven to exhaustion and making mistakes at work, Gae-seok finally decides to confront the neighbor responsible for the disturbance. When the door opens, he is met by a mysterious man who seems strangely familiar. Ignoring Gae-seok's complaints, the stranger forces his way into Gae-seok's apartment and locks himself inside, creating a tense and inescapable situation. What is the man’s true purpose, and what dark secret lies behind the sounds coming from the basement?