Tracking down a serial killer who lures his victims into isolated areas before killing them live on social media; Syd has a dangerous secret that clashes with McKenna's complicated past.

Time is up – Syd and McKenna need to get Knox’s fentanyl into police custody while leaving no trace of their own involvement. But can they pull it off when McKenna is distracted by Izzy’s strange behavior and a ghost from Syd’s past returns to haunt her?

McKenna is forced to come clean about her past to her husband, and both she and Syd attempt to convince him to bend the rule of law to save a life. In the meantime, our team find themselves trailing a group of thieves who managed to steal million of dollars' worth of untraceable diamonds.

It's busy for our team of detectives as they continue to investigate the case of the missing diamonds, and the task force executes a major drug bust. With the treat of Knox looming, both Syd and McKenna must confront some of their deepest secrets yet.

As their pasts continue to crash into the present, Syd and McKenna discover that an unknown player has been manipulating them all along. Meanwhile, the search for the missing diamonds continues, just as McKenna is face with a impossible choice; her brother or her future.

After a stunning discovery, Syd and McKenna debate who they can trust moving forward whilst also investigating a death that took place at a scenic Los Angeles park.

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 the Koreatown shooter behind bars, the team catches a new case involving a collegiate swimmer who is found dead in an apparent hit-and-run. Syd uncovers a new clue from Jen's past.

After the team connects a new mobile app to a string of crimes, it learns that the Koreatown crime wave is far from over. Syd discovers a shocking truth about who Jen really was.

Amidst the chaos of investigating a case that overlaps with Nico's new hustle, McKenna starts family therapy, and Syd delivers bad news to Jen's family.

Syd learns that the crime wave in Koreatown is forcing people out of their homes, drawing the attention of Ricky Leon. The LAPD searches for the team responsible for a deadly dispensary robbery.

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.