I Saw The Devil
Country & Year: (Korea 2010)
Jang Gyeong-cheol is a dangerous psychopath who kills for pleasure. He has committed infernal serial murders in diabolic ways that one cannot even imagine and his victims range from young women to even children.
The police have chased were unable to catch him. One day the daughter of a retired police chief becomes his prey and is found dead in a horrific state. Her fiance Kim Soo-hyeon decides to track down the murderer himself. He promises himself that he will do everything in his power to take bloody vengeance against the killer, even if it means that he must become a monster himself.