Watched this, it's okay. The second poster represents what's actually in the movie.
It's about an isolated soldier going bonkers slowly from the loneliness, the lack of information, the impressions which he tries to interpret from his scanty knowledge.
I found the setup interesting, reminded me of Alone. Not everyone can handle solitude, and this guy was especially under pressure due to the threats, and the strange happenings. They also show 3 bunkbeds, which means the station was meant to be manned by 6 person. This also has some implications, that by that time they could only afford 1 man per station.
The movie also left some questions. Liek some stragglers could create a life on the surface for themselves. And they weren't keen on embracing the bunker life. What's up with that? I dunno.