"The Killer" is a film directed by David Fincher, known for his work on psychological thrillers. The story follows an assassin who grapples with his profession and the moral implications of his actions. As he navigates a world filled with danger and betrayal, he must confront his own conscience and the consequences of his choices. The film is based on a graphic novel series by Alexis Nolent, which explores themes of isolation, identity, and the impact of violence. With a blend of suspense and character study, "The Killer" delves into the psyche of its protagonist, offering a gripping narrative that keeps viewers engaged.