Having been dumped for the 19th time by a girl named Katherine, recent high school graduate Colin sets off on a road trip with his best friend to find some new direction in life while also trying to create a mathematical formula to explain his relationship failures.
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.