Sloan discovered bondage in college. It was the only kind of sex that she found exciting. More than exciting, she found the experience impossible to get out of her mind. The explosive orgasms and her unexplained instinct to submit haunted her constantly. When one of her professors invites her to join Dominus, a mysterious organization dedicated to the principle of male domination, she accepts with little hesitation.

Her first encounter with Dominus is to play the role of a Fifteenth Century heroine in a private film. The part is full of intense bondage and masochism, so intense that she soon finds herself believing that the role is her reality and her ordinary life just a dream. Rather than deter her, the experience turns her into even more of a thrill junkie and when Dominus offers another challenge, to serve as a pony-girl, she jumps at the chance.

The adventure is everything she imagined and more. The idea of being reduced to the status of a sub-human, of being harnessed to a sulky, and whipped to pull a man around a track creates a disconnect from reality that leads to the most incredible sex of her life. In the midst of it, she meets Mason, a man with a thirst for extreme experiences that is equal to hers, but who also possesses the discipline that she needs to keep from floating off, perhaps permanently, into fantasy. But first they have a race to win.