The story is really good at for an action fanatic like myself, I really liked all the action in this movie. It's a thriller and suspense movie and I thought it was really good. It was an emotional rollercoaster for me and I really connected with the characters. I'm a huge fan of Chang Wook and I'm really happy he acted in this movie. Only bad thing is once you know the story, the suspense is gone and the movie is boring. Definitely not something I will watch again but really good movie to watch once.