One day, her father-in-law rescues an unfamiliar old man who has lost his memory and collapses, and brings him home. While her husband is away on a business trip, the daughter-in-law, who lives alone with her father-in-law, decides to temporarily care for the old man, despite her misgivings. As she cares for him, such as by wiping his body, and comes into physical contact with him, the daughter-in-law, who hasn't had sex with her husband in a long time, is unable to contain her sexual arousal and ends up performing a blow job. The father-in-law, who sees this, becomes jealous...The two old men and the young, beautiful daughter-in-law with big breasts begin a life of caregiving and sex.