When a charred body is found on a boat in the local marina after a three-alarm fire, Andy's instincts tell him the fire was no accident. An autopsy proves him rightthe victim was clearly murdered. Horton and his sergeant, Barney Cantelli, find themselves running in circles until Andy uncovers a shocking secret. His mother, who deserted him when he was 10, may be connected with the burned corpse. When two more suspects in the case die in horrific circumstances, Andy begins to fear for his own life and realizes that coming to terms with his pain-filled past will be crucial to finding the killer.