Three years into her marriage, housewife Ayumi finds her relationship with her husband stagnant and grows increasingly dissatisfied with their sex life. Trapped in a monotonous routine, she struggles with mounting sexual frustration. In her quiet town, a series of violent rape cases have recently occurred. One day, while masturbating alone, Ayumi is caught by the rapists who have been terrorizing the neighborhood. Gradually, their predatory grasp closes in on her. As these dangerous men invade her everyday life, she is thrust into a series of events that will irrevocably change her world.