Brandon Boader has developed the unique ability to transform himself into a different person, at will, through self-hypnosis. He could temporarily become a killer to take revenge on the men who murdered his parents. But then, how could he ever live with himself? And besides, if he "goes under" too deep (Four Steps Under), he could literally lose his mind. Forever.

When Brandon was six years old, his parents were killed during a home invasion. The two brothers who perpetrated the crime went free because of evidence mishandling at the crime lab. Brandon is determined to finally settle the score--without getting caught.

He recruits Dani Dimingo, a young woman he knew in junior high school, to help him carry out his scheme of revenge. The chemistry between them is undeniable, and they have a lot in common. Dani has struggled with mental problems too, having spent half of her teen years in a psychiatric facility. It's one of the reasons she's right for the job.

But while the two are executing Brandon's elaborate plan, Dani becomes terrified when she suspects that Brandon is about to kill one of the brothers. She can't believe Brandon is capable of murder, but given the strange mental state he's imposed upon himself, does Brandon even know what he's doing? Has one of his alter egos completely taken over his mind? And if so, is there any way for Dani to stop him before he destroys Brandon's life as well as her own?