One of Morgan's patients, the clever and selective call girl Cleo Thane, has written a memoir full of thinly disguised portraits of her clients, powerful men with odd fantasies and fetishes. She leaves this potentially explosive manuscript with Dr. Snow and then misses several appointments, causing Morgan to suspect foul play. Yet NYPD Det. Noah Jordain and his team, diligently pursuing leads in what's become a gory, ritualistic series of prostitute murders, have no evidence that Cleo, whose clientele puts her in a class by herself, might be a victim. Noah and Morgan are drawn to each other, but when Morgan can't persuade Noah to devote more effort to the search for Cleo, she determines to go undercover and meet Cleo's principal clients herself.