In Dallas, when a good Samaritan is gunned down trying to protect his friends, detectives must unravel a tangled web of bad tips and lies in their hunt for the killer.

In Dallas, an unidentified girl is found brutally shot in a field. Detectives Scott Sayers and Esteban Montenegro discover that she may have been killed for her silence. Then in Cleveland, a young father is shot in the head trying to break up a fight.