Ryoko, a housewife living with her son while her husband is on an overseas assignment. One evening, Ryoko's son's friend catches her masturbating and forces himself on her. Another friend who hears about the incident also takes advantage of the situation and molests Ryoko in her bedroom while her son is not looking. Despite trying to resist, Ryoko rediscoveres forgotten sexual pleasure and moans with ecstasy as she engages in an orgy with the young men.
