I Saw the Devil is a 2010 South Korean thriller that follows the story of a secret agent, Kim Soo-hyun, who embarks on a quest for revenge after his fiancée is brutally murdered by a psychopathic serial killer, Jang Kyung-chul. The film delves into the harrowing cat-and-mouse game between the two men, exploring themes of vengeance, justice, and the moral complexities involved. With intense violence and psychological depth, the film is a gripping exploration of the darker aspects of human nature.

Lee Byung-hun, Choi Min-sik, Jeon Kuk-hwan