Idris Elba returns to his iconic role as a self-destructive near-genius detective on the edge of law enforcement. Detective Chief Inspector John Luther will learn the hard way; he may never be able to walk away from capturing the tormented psychopaths that lurk the streets of London. His attempt to leave the darker side of humanity behind for a chance at a “normal” life is quickly thwarted when he’s drawn into a terrifyingly complex case. A cannibalistic serial killer delivers a devastating blow that not only pulls him out of seclusion but pushes him closer to the edge than he’s ever been.