Her husband is away on a solo business trip, leaving her alone with his father for a long time. Momo, feeling lonely, masturbates to pass the time, but her father catches her in the act. The next day, he takes advantage of the situation, claiming sympathy, and attacks her. At first, Momo resists, but she's enveloped in a strange sensation of fulfillment. And then, she starts seeking out her incestuous father...