Husband is a sex addict, wife is bisexual—an unusual couple drawn into a whirlpool of desire. Tomoko (23), a female friend, is innocently invited to a dinner party at the couple's home. Lulled by homemade food and fine alcohol, she gradually lets her guard down and drinks too much. When she steps away, a mysterious drug is slipped into her drink, clouding her consciousness. She's carried to the bedroom, stripped naked, and becomes prey in a lesbian encounter. Cunnilingus, vibrator torture, and scissoring follow, as their genitals are linked together with a thick double-ended dildo. The wife frantically grinds her hips, reaching climax. Before Tomoko realizes it, she's pulled into this wild, chaotic orgy.