The only reason  i saw the movie because  Gong Yoo was it. Though i heard that it was good a movie, i didn't have much expectation. I though it was just a typical zombie horror, But it really exceeds my my expectation. The story is good , but the acting of the cast that made is movie so great. Music made the movie more suspenseful, CGI  was very good, zombies looked realistic. It doesn't have a lot of scary scenes, but it really made my pulse running high. It made me guessing whats going to happen next. It is more like a zombie/drama film. Also there were some real emotional scenes( real tearjerker). I would like it more if it have happy ending. It is a must watch movie.