Three years into a happy marriage, Rena and her husband have drifted away from regular sex. He secretly fantasizes about being cuckolded and becomes fixated on seeing his beloved wife taken by other men, eventually finding a members-only wife-swapping bar. After witnessing the wild encounters inside, he pressures his reluctant wife to come along with the promise that they will only watch. But once men begin gathering around Rena, she gradually forgets that the visit was supposed to be for her husband and loses herself in them.