When Vic discovers that Ronnie has been burned as payback, the rest of the team does everything they can to put an end to him. Meanwhile, Claudette makes headway on her investigation against Vic after a conversation with Corrine, and Dutch takes Danny under his wing as they try to find the suspect of a Thai Town beating.

Mackey tries to help an old acquaintance find a wayward teenager, but the search quickly turns ugly when the missing teen appears to have been involved in a shoot-out. Meanwhile, Shane heads out into the field with his new partner Army, teaching him shady police tactics and seeing how far he'll go to be partnered up. Plus, Aceveda spends his last day trying to bury Vic for good, which makes things difficult for Rawling trying to take his place.

Claudette notices Hiatt's mistake when he makes an arrest, and Billings delivers shocking news to the department. Vic forms an alliance with Aceveda, while he waits for his review board hearing. Meanwhile, Shane's life keeps spiraling out of control.