First of all you can't go wrong watching So Ji Sub and Kang Ji Hwan in a movie together!!! This is a movie within a movie and both main characters have a problem with distinguishing reality from fiction. Both Ji Sub/Kang Pae and Ji Hwan/Su Ta are so intense. They play off of eachother very well. I am a total Ji Sub fan...he plays dark and scary very well. If you are looking to watch something violent, then this is so the movie to watch!!! It is great!!!