Hell breaks loose in Migum Apartments...
A barber who is a witness of all the strange events of the apartment, a struggling third-rate writer, a young woman who became high strung and isolated after losing her boyfriend, and Sun-young who lost her child and is beaten by her husband. With all these people living together under one roof as if they're all victims of the terror lurking within Migum Apartments, Yong-hyun moves into room 504 after a writer named Kwang-tae died in a fire in that very room and becomes a newcomer amongst them. As Yong-hyun settles into his new home, he finds himself involved in a series of strange occurrences that unlocks the terrifying secrets lurking in his new home...