Watch _Duplicate_The Black Room

A room gets put up for rent following the mysterious murder of its previous tenant. When a man sees the great deal offered by the brother and sister landlord for this room, he immediately puts down the first month's rent and starts spending his days there, even though he has a home. When he comes home, he tells his wife about the fantasies he has of having sex with various women each day in his new apartment. His wife goes along with it for a while, but when she discovers that her husband's stories are much more than just fantasies, she starts to do some investigating.