Young and handsome boyfriend, Tae-ho, and her married girlfriend, Heo-jin were having sex in a motel when her husband Won-jae suddenly surprises her on the spot.  Won-jae's obsession and madness with his unfaithful wife became more concrete through the problem solver Na-ri, eventually leading him to kidnap and detain his wife and make Na-ri seduce his wife's boyfriend Tae-ho into bed.