Masakiko is tormented, knowing her husband is cheating on her but unable to get evidence. When detective Yoshino shows her photos of her husband's infidelity, she's consumed by jealousy and anger. The detective's words, "The wife should do the same," unsettle her, and she starts to feel frustrated and vengeful. She abandons her chastity, and her white skin and beautiful body are manipulated by the detective, driving her to a frenzied climax. As she's wrapped in the secret of adultery, she's torn between guilt and a sense of superiority, and gradually, her heart is captivated by the detective's sexual techniques and robust manhood.