After the bodies of two young L.A. transplants are found poisoned, Chloe and Lucifer hunt for the killer. Meanwhile, Maze convinces Chloe to go out for drinks, which the detective perceives as an act of friendship, but is actually part of a bet between Maze and Lucifer. Afterwards, the two make a shocking decision.
When a youth pastor is found murdered at a church, Backstrom and his team at the Special Crimes Unit must solve the case while navigating the tenuous terrain of a possible cult. Meanwhile, Backstrom's ex-fiance, Amy Gazanian, is recruited by the Chief of Police to head up the newly formed Civilian Oversight Committee with the task of investigating questionable conduct within the Police Bureau, pitting Backstrom’s squad against hers.