Chie (Kobayakawa), who has been tasked by a sadistic idle madam to find a woman to become a human toilet, has her eye on the daughter of a wealthy businessman, Mariko (Hazuki). Kidnapped and confined through the schemes of Chie, who infiltrated as a servant, Mariko is violated by a masked man and forced to perform lesbian service to Chie while being trained to become a human toilet...
