The movie is about a crew of anonymous sailors controlling the top secret Korean nuclear submarine known as the Phantom. Our main character became an unwilling crew when the government officially erased him from existence...
The premise of the movie is good, though it would make even a more interesting movie if that idea was exploited more. The war scenes involving the several submarine were rather unrealistic. Why didn't the Japanese submarine use active SONAR to search for remaining but had to endanger itself? I guess it is pretty typical to portray the incompetence of Japanese army in a typical Korean movie.
The acting was good. The tension was good.
One side note. This was probably the 3rd recent Korean movie that portrayed America negatively. I sense the rising Korean patriotism may be fueling this displeasures towards formal colonial master... Life imitates arts, and the changing attitude of Koreans towards America is showing...