When a priceless painting is stolen in a museum heist, Morgan and Karadec team up with an art-recovery expert to unravel a tangled case and fierce ownership battle. Meanwhile, Soto is determined to uncover the secrets hidden inside Roman’s backpack.

It's almost Halloween, and a wealthy lawyer is found dead in his "haunted" Victorian mansion. As the team investigates the spooky case, Captain Wagner surprises everyone with his skills. At home, Elliot plays mediator between Morgan and Ava.

When a social media stunt turns deadly, Morgan and Karadec head to an influencer content house to track down answers. Meanwhile, the LAPD team adjusts to Captain Nick Wagner's new role, and Ava seeks out more information on Roman’s disappearance.