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Sim Deok-Su (Yang Taek-Jo) is the owner of a large apartment complex. Although he sometimes berates his tenants, he also cares about their well being. One day, Sim Deok-Su enters the apartment of a tenant who is late on his rent. Sim Deok-Su finds the tenant dead and hanging from a noose tied around his neck. The other tenants believe the tenant killed himself after being hounded by Sim Deok-Su. Sim Deok-Su then meets former detective Park Pyeong-Dal (Kim Jin-Tae). Park Pyeong-Dal tells Sim Deok-Su that the death of his tenant was not by suicide, but in fact a murder by a serial killer. The serial killer operated in the neighborhood thirty years ago.