John's reappearance in her life rocks Claire, immediately threatening the seemingly idyllic, but fragile, life she's built with her devoted family. Desperate, John appeals to Claire's conscience and sense of guilt to help him catch the killer. But is John there to win justice, or Claire?.

The discovery of a new victim carries a haunting message for Claire, her old shoulder number left on the body. It can't be dismissed as coincidence.

As the threat to her own life intensifies, Claire grapples with the mind of her tormentor. Desperate to atone for the past, will her sense of guilt stand in the way of survival?