Southbridge Homicide Detective Jim Haddick had always been a gifted officer with an impeccable service record, relying on his instincts to solve the cases others couldn't. His personal life often paid the price for his professional dedication, something of which his ex-wife was constantly willing to remind him. Failing at his responsibilities as a parent, and struggling to maintain a relationship with his son, Jim vowed to be a better father, inviting his son Ben to stay with him for the summer. But when a serial killer terrorizes the city of Southbridge, Detective Haddick finds himself pushing Ben away as he is drawn into a deadly game of cat and mouse. Slipping further into his duties as a police officer and skidding uncontrollably down a dark path, Jim becomes consumed with stopping the killer at all costs. As the slayings become more frequent and more severe with each new victim, Jim tries desperately to decipher the clues being left by the killer at each of the crime scenes, hoping to put an end to the sadistic reign of terror. When the clues begin to lead him to investigate members of his own department, trust turns to doubt, and doubt to suspicion as dark secrets are uncovered at every turn.

Who can you trust when everyone is a suspect? And how do you catch a killer who knows every move you're going to make before you do?