Before I watched this movie I read several reviews of it. Most of them said that there is no explanation for everything that happens. I disagree, the movie does explain why things happen the way they did. Maybe not with words, but with actions. From the start we know about the ability Cho In has. And when we meet Kyu Nam the first hint about his ability is already given. Throughout the movie it gets more and more clear why Kyu Nam is able to resist Cho In's mind control. I think the makers of this movie showed it in a very clever way, instead of just saying it, showing it. This movie can be really harsh at times. Meaning it's not for the weakhearted. I loved this movie. It was exciting from beginning to end and left me sitting on the edge of my chair. The acting was great. Kang Dong Won is a really good actor, and I loved how they used foreigners (who spoke fluent Korean, yay!). I would definitely recommend this movie. Unless you are weak of heart of course ;)