I Saw the Devil

I Saw the Devil (Korean: 악마를 보았다) is a 2010 South Korean action thriller film directed by Kim Jee-woon and written by Park Hoon-jung. Starring Lee Byung-hun and Choi Min-sik, the film follows NIS agent Kim Soo-hyun (Lee), who embarks on a quest for vengeance when his fiancée is brutally murdered by serial killer Jang Kyung-chul (Choi). I Saw the Devil marks Choi Min-sik's first major role since the changes to the Korean screen quota system. The film premiered in the United States at the 2011 Sundance Film Festival and had a limited U.S. theatrical release, where it received generally favourable reviews from critics who praised its cinematography, cast performances and action sequences but criticized the graphic violence.