After an unexpected introduction to S&M on a train, Cassie is consumed by a need to explore the intriguing world it promises - a world of bondage, domination and her submission. She agrees to give herself to the inscrutable Mr King for a day, to sample the pleasures of his complete control over her. She is tormented, humiliated and used but finds herself hooked on the curious games they play. Her lesbian lover, Becky, is shocked but agrees to Cassie visiting Mr King once more. It is then that she is initiated into the debauched Cheesman Club, where she is expected to go much further than she ever imagined she dare...