Aimi Yoshikawa plays Keiko, a modest young married woman living with her husband. While her husband is away on a business trip, a perverted man targets her, breaks into her home, and violently assaults her. Afterward, he forces her to prepare meals and continues to stay at her house, ruthlessly indulging his desires by tormenting her body. He makes her perform degrading anal licking, forcing her to serve him with her tongue. Humiliating female dog training breaks down her pride as the once-pure wife gradually transforms into a depraved bitch. Through repeated acts of degradation and training, the film dramatically portrays the psychological and physical changes she undergoes.