Lydia is the favourite child of Marilyn and James Lee; a girl who inherited her mother's bright blue eyes and her father's jet-black hair. When Lydia's body is found in the local lake, James is consumed by guilt, and Marilyn, devastated and vengeful, is determined to hold someone accountable. But it's the youngest in the family - Hannah - who may be the only one who knows what really happened.
The first message sent to Tom Thorne's phone was just a picture - the blurred image of a man's face, but Thorne had seen enough dead bodies to know that the man was no longer alive. But who was he? Who sent the photograph? And why? While the technical experts attempt to trace the sender, Thorne searches the bulletins for a reported death that matches the photograph. Then another picture arrives.