When a boy is targeted by a powerful cartel, two detectives with complex pasts race the clock to keep him safe, but when Syd's personal quest for justice threatens their efforts, the pair must decide whom they really serve and protect.

Syd and McKenna are called to investigate when a body seems to plummet from the sky; the partners realize they need to trust each other to escape the ghosts of their pasts.

Syd and McKenna ramp up their personal search for Gabriel Knox and let the Bens in on their search for Arlo. Syd faces a family crisis. McKenna must make a difficult choice.

Syd, McKenna and the team band together as they race against the clock to save one of their own, finally coming face-to-face with their greatest enemy.

With McKenna's help, Syd searches for Jen's killer as she grieves the loss of her friend. The death of a Koreatown legend has the community up in arms wondering who could be responsible.

McKenna grieves the death of a loved one with Syd by her side. The LAPD detectives work as a united force to put an end to Lustrum Holdings and restore peace in Koreatown.