Little wonder, then, that "I Saw The Devil" is one of the year's best films, although I would warn that it is harrowing, visceral stuff. It plays like some fevered middle ground between "Se7en" and "The Game," but that's not to say it's just some Fincher knock-off. Far from it. I'm frustrated that I don't have the credits for the film to refer to, so I'm not sure if it's an original script or an adaptation, or who wrote it. It's a fiendishly clever construct, though. In the film's opening moments, a beautiful young woman is on the phone to her fiancee, who is indeed a South Korean secret agent played by Lee Byung-hun. She's got a flat tire, and she's called for a repair truck to come help her. Instead, someone else stops by, an unsettling figure played by Choi Min-sik . When she says the wrong thing, it's almost like it's the excuse he's been waiting for, and Choi Min-sik goes mad, murdering her with sudden, awful fury. Once Lee Byung-hun finds her body, though, and sees w…