In Cleveland, after a man is found dead in his car, the autopsy reveals he was strangled to death. Detectives Nate Sowa and Ray Diaz take the case and uncover a secret relationship that could lead them to their killer. But with Sowa's retirement right around the corner, can he solve the murder before the case goes cold?

Miami Detectives Fernando Bosch and Rick Martinez are investigating the murder of a man shot dead on the street in the middle of the day. The victim's girlfriend was there and may know the identity of the killer. In Cincinnati, detectives Kurt Ballman and Jeff Schare investigate the murder of a 17-year-old boy who had been shot in the head while he was sleeping. They have to find out if the victim's friend, who fled the scene, is a scared witness or the shooter.