Yoon Jong-woo (Im Si-wan) is a man who moves to a dormitory in Seoul after landing an internship in a company. He decides to stay in an dire dormitory to save money. However, mysterious events start happening in his apartment, causing Jong Woo to start fearing the apartment’s residents, as they creep him out.

Seo Moon-jo (Lee Dong-wook), plays a dentist who works near the Dormitory Jong-woo stays.

The drama is also known as Strangers from Hell.