The daughters-in-law live with and care for their aging father-in-law. The patriarch, unable to suppress his lewd desires, begins to lose control, lusting after his sons' wives whom he sees every day. He approaches them with threatening, coercive behavior, yet his persistent, obsessive caresses confuse the women, gradually drawing them into pleasure. Bound by familial ties, the taboo relationships deepen—despite their initial resistance, the women find themselves sinking into forbidden ecstasy.