DCI John Luther, an extraordinary yet ordinary man, is a detective working for the London Metropolitan Police Service's Serious and Serial Crime Unit. A dedicated copper, Luther is also an inspired maker of connections and a whirlwind genius. He is dazzling, obsessive, possessed - and sometimes dangerous in the violence of his fixations. But Luther has paid a heavy price for his dedication; he has never been able to prevent himself from being consumed by the darkness of the crimes he deals with. With Luther, the job always comes first and his dedication is a curse and a blessing for him and all those close to him.
Unlike most other dramas each episode of this crime thriller opens by revealing a killer's identity. The murder is then investigated and the relationship between the hunter and their victim is investigated.