Kyung-Chul is a dangerous psychopath who kills for pleasure. Soo-Hyun, a top-secret agent, decides to track down the murderer himself. He promises himself that he will do everything in his power to take vengeance against the killer, even if it means that he must become a monster himself.
- Genre: Thriller, Horror
- Studio: Showbox, Softbank Ventures, Peppermint&company, Siz Entertainment
- Keyword: cemetery, police chief, secret agent, psychopath, revenge, murder, serial killer, severed head, mercilessness, brutality, cannibal, tracking device, sadistic killer
- Cast: Lee Byung-hun, Choi Min-sik, Jeon Kuk-hwan, Cheon Ho-jin, Oh San-ha, Kim Yoon-seo