Sasha Clark wasn't expecting to meet anyone in the bar of the hotel where she was staying, but after a long day of meetings she's accosted by a drunk man. Enter her hero, Mr. Sin. What follows is a night to remember. When Sasha returns home she begins her new assignment. Her new client is none other than the devil himself, Mr. Sin, her Vegas one-night stand. Vincent wants to get Sasha out of his system and move on, but when she's in danger, he's driven to protect her. The more time they spend together the more their bond grows. She soon realizes she's in love with her devil, putting her at risk from his enemies who want nothing more than the downfall of the Mazzanti family.