"I Saw the Devil" is a 2010 South Korean psychological thriller film directed by Kim Jee-woon. The movie stars Choi Min-sik and Lee Byung-hun in the lead roles. The film's plot revolves around a prosecutor named Kyung-min (played by Choi Min-sik) who seeks revenge against a serial killer named Soo-hyun (played by Lee Byung-hun) after his fiancée is brutally murdered.
