Three years into her marriage, Rika is living a happy life with her husband—until her father-in-law, Morio, suddenly reappears and shatters her peace. Returning after a 15-year absence, Morio targets Rika for financial gain, imposing his vile desires upon her. Kind-hearted and unaware of his malicious intent, Rika gradually falls into his trap and is ultimately raped. Unable to confide in her husband, she obeys Morio's commands out of fear and confusion, enduring repeated abuse as she is psychologically and physically broken down.