Officer John Nolan and Celina witness a shooting, realize the victim was already dead, and investigate further. Back at home, Bailey has been feeling off-center ever since the proposal, leaving Nolan to wonder what he can do to make her feel more comfortable. Elsewhere, Lopez and Harper enlist Lucy's help to investigate the gang-related murder of a local shopkeeper.

Officer John Nolan and the team investigate the unexpected death of a suspect in police custody. Their search also uncovers a very delicate loose end that could jeopardize Officer Celina Juarez's career. Meanwhile, Sergeant Grey and his wife, Luna, go to New York to visit their daughter, Dominique, only to realize she never made it home.