Kiriko is involved in an affair with her son's friend. One day, a man discovers their secret and begins secretly filming them, blackmailing Kiriko and extorting money from her. Initially furious at the despicable act, Kiriko gradually becomes accustomed to the situation, succumbing to the pleasure and eventually growing dependent on the twisted relationship. Meanwhile, her son, upon learning the truth, becomes enraged and decides to secretly record the encounters himself. Amidst a tangled web of relationships and conflicting emotions, each person is consumed by their own desires.