This is a forbidden love story between the fifty-year-old woman, Fumiko, who is treated like a servant by her husband, and her step-son who takes pity on her. When her step-son's marriage is finalized, Fumiko masturbates in her his underwear to drown her sorrows. On the day he leaves home to live with his fiancée, Fumiko is unable to suppress the feelings she has been harboring in her heart and decides to take action....