I really dig this 'Genre' of Horror films where there is a military 'Outpost' or 'Bunker' somewhere, and something is amiss...
Immediately I was frigg'n blown away by just the sheer look of the film. The Blu-ray was SO damn sharp and dimensional, that I fully expected the soldiers to walk right out into my living room at any time! It was absolutely LOVELY to look at. And the Dark Blue tones and lighting were done very well.
One thing though... and you will likely be able to tell this by some of the other reviewers' Summaries here. This is a VERY SLOW-building, suspenseful Horror film. Those who prefer a lot of fast action or continuous mayhem will likely find it pretty slow and boring. BUT... if you don't mind, or like me, actually really enjoy the slow-burn type of Horror films, you will probably like it.
Another real strong element in this film is that it is such a DAMN Mystery. There were several places along the story where I'm thinking, 'What the hell just happened?' Or, there are places where you almost swear that they show multiple flash-backs, but the same scenes are somehow different, GREATLY adding to the sense of Mystery and Suspense. Without giving anything away, I THINK that at the end the audience pretty much knows WHAT the primary 'Cause' of everything was. But, to me it was a little confusing at times as to exactly WHO was doing WHAT? Especially with the multiple flashbacks.
Ultimately, I felt that the film was paced very well, with a nice, slow-burn building of Suspense and Terror as to what the hell was going on. The primary actor was very good too, and I think that 'Through' his eyes, the audience really feels and experiences what is going on in a more visceral way.
I won't give away what it is that is behind what's happening, but I will say that it was a little bit different of an approach than many of the other similar films of it's type. I personally probably prefer the 'Other' approach more so, just for my preference and taste, but even though this one came from another angle, I still felt that there was a good, strong sense of Mystery, particularly, and I felt that the director and actors did an excellent job!
I would say that if you are familiar with movies like this, and IF you don't mind a bit of a slow-burn to your Horror films, then you likely will find this well made, Dark and Mysterious Korean Horror movie entertaining...