"Multiples in love: imagine the possibilities," said one of the twisted couple's earlier victims. Lily DeVries and Ulysses Maxwell have quite a few things in common. Both were horrifically abused as children, then diagnosed with multiple personality disorder, and eventually incarcerated in the same Oregon mental institution. There, they fell into the hands of the well-meaning, genially sinister director, Dr. Al.
When the ingenious lovers engineer a bloody escape, the only people who have a chance of stopping them are the rumpled, endearingly flawed E. L. Pender and Dr. Irene Cogan, a brilliant psychiatrist who loves Lily almost as much as she fears Maxwell. With the aid of a private investigator, Pender and Cogan take on a pair of killers who win hearts as easily as they slit throats.