What a movie. When I rented this movie I didn't know what to expect. It is usually is a hit or miss for Korean movies but this was a grand slam out of the park type of movie. The film is about a former detective turn pimp trying to catch a serial killer who is killing his prostitutes. It's a big cat and mouse game between the two throughout the whole movie. The plot sounds thin but there is so much more than what meets the eye. This is one of the best thriller/serial killer movies I have ever seen and I don't want to say too much about the plot because it is very edge of your seat kind of stuff. The film never drags and it becomes more intriguing the more you watch and you feel like you know the character because the actors portray them so well. This is a very violent and gruesome film that shouldn't be viewed by the squeamish even though there isn't that many bloody scenes for being a serial killer movie. The movie achieves so much more with less, which hardly ever works in films that need violence to be a success. I wish that Hollywood or even European films would have the brass to make a film this unique and daring at the same time. The thing that this film has going for it the most is that it's wonderfully erratic. You can never guess what is going to happen next and that is the reason why Korean movies are so fantastically entertaining. I rank this movie in my top three greatest thriller/serial killer movies of all time somewhere between "Seven" and "Silence of the Lambs". The characters of this film really flesh out the story and let you jump right in. I can't help but stress the point that this film is very unpredictable and the style of the story telling is subtle but very effective. This film is a sure bet and you will not leave disappointed.