John is a college student currently separated from his fiance Laura, while she begins a hot sexual affair with her roommate Christine. Though John is anxious to have Laura back, with Christine now a permanent fixture in Laura's life, the terms of the relationship are about to radically change. Either John agrees to be submissive in a menage a trois with two dominant females, or he's out. Eager to stay in Laura's good graces John agrees to anything, including public humiliation, panty wearing, and Laura's unique punishment for unauthorized masturbation: a locking chastity device. She tricks him into putting it on, not telling him that Christine has the keys. Later he learns from Christine that a key has been hidden in his weekend bag all along. But now, the demanding Christine wants him to consciously choose to remain in chastity! John can't help wonder who's running the relationship, Laura or Christine? As the two femmes take charge, John is trained to serve their every whim, to call them mistress, and play their humiliating sexual games. When he fails to please this daunting duo, he suffers a variety of painful punishments from bondage to whipping to being sodomized with a strapon. Despite the rough demands of his new life, John finds his surrendering role strangely pleasing, and highly erotic. All misgivings aside, he's still in love with Laura, and willing to slavishly serve both women in order to have her. But how long can this strange menage a trois survive? Will John ever have Laura to himself again? Is Christine really falling in love with him? Although John's journey into chastity has just begun, it's certain to take some curious twists as these two lovely, in charge females turn this wary college boy into their groveling slave.