In Charlotte, rookie Detective Norma McKee gets her first double-murder: a young couple shot in their car by a backseat passenger. Inside the vehicle, detectives find what may be a vital clue, a baseball hat that might contain the suspect's DNA. Meanwhile, seasoned Miami detective, Emiliano Tamayo has two cases in two days. First he responds to a call reporting a foul smell, only to find a family of three found dead in their home; later that night he is called to the scene of a young man killed over a fifty-dollar bet. With four deaths in forty-eight hours, Tamayo calls on his years of experience to solve the cases.