There is no plot spoiler in telling you that all but one of the group die as that is shown at the films start and from there we are taken back to an earlier point to explain how this came to pass. All of the men are, clearly, haunted by the things they have seen and done. The only enemy appears to be the enemy within themselves; born out of the awful acts they have been involved in.
It's an interesting premise for a film and a period in modern European history that hasn't really been tackled in any detail before but sadly the film drags even with a running time of only 80 minutes. The decision to focus on the internal struggles over "action" is an honorable one but something is missing and the pace of the film doesn't allow you to overcome the fact that nothing is actually happening.