A dark tale of people going down, because conditions, because they are trapped in a fight they can't win, a game where everyone loose. Where there is only bad choices and you are doomed no matter what you do. Where humanity and good is always seen as weakens and punished.
There are small clues on how to escape, that the house must be torn down, but it seems a little bit out of context.
But does it work then. Well, yes and no. I have problems with credibility. I don't really think that everyone in that world act that stupid. I don't believe that Danish prisons are like that.
I have a problem with the scenography. It seems too ordinary, too much like every day. It does not set a scene in which the events seems likely. The characters seems to much like you and me, to act like they do. Maybe a slight touch of darkness and some background noise could do it.
It is probably a educated choice of the creators, to make the events happen in a recognizable world. But the distance, verfremdungseffekt, that could make me believe in the story and the characters are missing.
But still, it is a good series, it is worth watching. Well done.