I Saw the Devil(2010)
Videos: Trailers, Teasers, Featurettes
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.
I Saw the Devil - watch online: streaming, buy or rent
Currently you are able to watch "I Saw the Devil" streaming on Strim. It is also possible to buy "I Saw the Devil" on SF Anytime, Blockbuster as download or rent it on Blockbuster online.