Reiko Kobayakawa plays Tomoko, the daughter of a wealthy family, who is targeted by a sadistic socialite seeking a human toilet. Her downfall begins when she becomes entangled in the scheme of Chie (Reiko Kobayakawa), a maid who infiltrated the household. Kidnapped and imprisoned, Tomoko is raped by masked men, forced into lesbian servitude for Chie, and systematically trained into becoming a sex slave and cumdump. As psychological torment and physical abuse escalate, the film depicts her mental deterioration and transformation into a broken, obedient vessel. A brutal tale of humiliation, confinement, and total submission from Attackers' Ryuu Baku (Dragon Bondage) label under the Slave Castle series.