I really enjoyed this movie, but as the others said, it was really disappionting. The idea wasn't new, but I like these kind of stories very much so it disappointed me even more. It's like the writers thought: "We're making a fantasy movie, so everything is plausible" No, it's not. There were just too many WTF?! moments, but no positive WTF?! I am a really big fan of Kang Dong Won and the other actors were really good too. They really casted the right people, who gave of the right feeling for this kind of film. I don't know if I can say, you should watch it. Storywise it's somehow a really bad movie but everything else was great. I don't think I wasted my time watching this and I enjoyed it. If the writers didn't write that bad, it could have become one of my favourite movies.