I don't know why this film is so underrated. It might not live up to fans' expectations as so many famous, veteran Korean actors and actresses were casted, but I find it's pretty realistic and interesting. Each and every character was portraited well, and the plot is full of thriller and emotions. Another thing I love about this film is that the government did a really good job trying to save the plane - from the Minister to the scientists. There's no irresponsible, despicable bureaucrat. Also, hats off to the director, I bet it's not easy to film such kind of scenes. I definitely recommend this movie!