Is there a serial killer on the loose on Cape Cod? Multiple, bizarre murders are taking place in Dennis, MA, Detective Jack Contino's new town. But they all have different signatures. One looks like a MOB execution, another is a brutal knifing, yet another is the shooting of a businessman. The killer evens has his sights on Jack's wife, Natalie. Somehow MOB boss Tommy Shea, Jack's longtime nemesis, comes into the picture. He often does. What is his link to these events? Jack can't get rattled, but his nerves are getting frayed. He's never had so much at stake in a case. He and his colleagues, including old pal Leo Barbado, get on the trail and must put the pieces of this puzzle together.