53-year-old Yūko experiences the shocking ordeal of being raped by her son, who has developed romantic feelings toward her as a woman. While harboring intense disgust toward her son's abnormal affection, her body gradually begins to respond truthfully, revealing an inner conflict. Torn between these conflicting emotions, she struggles with her own repressed desires and contradictions. The story deeply portrays the clash between her son's obsessive love and her role as a mother, depicting a disturbing tale of incestuous relationship.