I Saw the Devil is a movie that has a good premise, good acting, good directing, and good production values. Despite having so many good things going for it, it’s a piece of crap thanks to having a boneheaded script. No matter how wonderful everything in your movie may be, if your script sucks ass, your movie will suck ass.
The film takes place in South Korea, and the premise is that a serial killer’s latest victim was a young woman who happened to be the fiancée of a spy. The spy uses his training and advanced technology to hunt the killer. But he doesn’t just hunt him down and murder him. No, his revenge is to psychologically torment the killer, making his life a living Hell. Like I said, great premise. Sadly, the characters act like stupid dipshits, ruining the movie.