Yukiko takes care of her husband, who became disabled due to a traffic accident. Their son, who had been working in Tokyo, also returned home, and they hired a caregiver, gradually stabilizing their lives. However, soon Yukiko began having a physical relationship with the male caregiver. Every time the caregiver came to take care of her father, they would engage in intimate acts. Noticing the unnatural behavior between the two, their son decided one morning, after leaving for work, to return home. What he witnessed was his mother and the caregiver shamelessly indulging in pleasure...
