The film, which was shot on location in South Korea, concerns an investigation into the circumstances surrounding a fatal shooting incident within the DMZ. The DMZ is the border area between North and South Korea which is heavily guarded by soliders on both sides.
This film makes North Korean soldiers actually have personalities, and aren't just faceless "enemies" which I think is really important. It shows the struggle of every one involved and is pretty heartbreaking.
It is a crime/thriller though, so its not just a sad story, its super interesting too!