Harua is a married woman living a happy, comfortable life with no complaints—yet dissatisfaction slowly begins to creep into her routine. One day, on a whim, she cheats on her husband. The man she had an affair with discovers her secret and shows up at her home, demanding her obedience as the price for keeping quiet. Powerless to resist, Harua reluctantly submits to his commands. In the very house she shares with her husband, she is repeatedly tormented by another man, caught between guilt and pleasure. As the days pass, she gradually loses herself. The hidden impulses and desires buried within this married woman begin to spiral out of control.