Amy Gellar is sent by her best friend, Courtney, to apartment sit for gynecologist and secret dominant, Dr. Eric Masters. Assuming the man will be gone for the rest of the weekend, he comes home early to find her there instead of Courtney. When she discovers that there is more to this man than meets the eye, she is thrust into a world the likes of which her body and mind has never known but has always craved to explore. As she struggles to get past Eric's self-absorbed exterior and become his ideal sub, another dom comes along, Eric's cousin, the legendary Dr. Christian Masters. A dom far more powerful, captivating and aggressive than she can possibly imagine. He's the ideal ""bad boy,"" dangerously sexy and a force to be reckoned with in the bedroom. Once Amy realizes there's something better out there and Eric senses Christian is threatening his relationship, it becomes a battle of the Doms. Both of them are vying for her submission, but only one can win her heart.