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.

In Detroit, Sgt. Ernest Wilson and his team investigate the double-homicide of two twenty-six-year-olds, shot execution-style in the basement. When investigators find a slip of paper at the crime scene, it initiates a manhunt that sends investigators to the other side of the country.