The story of the North Korean soldier, betrayed and surrounded on all sides, seems quite familiar by now if you've watched enough South Korean action films. In the early stages of the movie it was difficult to understand what was going on, and where each character loyalties lay. I would rewatch it only to understand the early parts of the movie better, in the context of the later part of the movie. If I am correct, this is Gong Yoo's first turn as the lead in an action thriller. He is committed and his hand-to-hand combat scenes are quite gripping, but Park Hee Soon steals the show for me. His wily, dogged South Korean officer in the NIS, pursuing Dong Chul by all ways and means. An alright action film with the necessary thrills and spills for about 2 hours.