The Four Seasons Brothel is run by a ruthless madam, Lady Chun Yi. Countless young girls have been kidnapped or bought and then sold into a life of servitude, prostitution, and torture at this brothel. Ai Nu, an honest, but poor family's only daughter, is one of the newest girls that was recently kidnapped and sold to Lady Chun. To complicate matters even more, Lady Chun is a lesbian and quickly falls in love with the virginal Ai Nu, who will not let her spirit be broken and tries to escape again and again. This causes Lady Chun to use all of her resources to break her, including auctioning off Ai Nu's virginity to a group of wealthy businessmen. She eventually entrusts Ai Nu with a number of ancient kung-fu secrets like the Ghost Hands, which allows you to thrust your fists into an opponent's chest. Soon after murder erupts within the brothel. A diligent detective, Chi Te, visits the brothel and becomes increasingly involved in the murder investigation. He realizes he must do everything he can to prevent Ai Nu from taking her much deserved revenge on everyone that has wronged her over the years.