I heard this film was quite brutal, and I don't mind that, and of course, I'm eager to check out new Michael Fassbender fare.
It is indeed brutal, and people with weak stomachs probably shouldn't watch this. When it comes to movies, I have a pretty much cast iron constitution, but there were a couple of parts that were very, very difficult to watch.
The premise is that Steve (Fassy) takes his girlfriend, Jenny, out to Eden Lake for a romantic weekend and to pop the question. Trouble occurs when they are harassed by a gang of teenagers. As Steve tries to reason with them -- and act a bit macho to impress Jenny -- things go rapidly downhill as the teenagers proceed to terrorize them. They attack Steve and hunt Jenny, and what should have been a wondered getaway turns into a fight for survival.
( Here be spoilers )There are problems with the movie. There are times when suspension of disbelief is tried, and you think why didn't they (Steve and Jenny) just do this or not do that, and they would have got away. Some of the coincidences were a little contrived as well, but in all it's a very good thriller, mostly because of the realism. It leaves you with the feeling this could really happen. There's no monster, no supernatural enemy, just a bunch of kids who are, like too many kids today, total little thugs who get nothing but enjoyment from harassing people, and aren't controlled by their parents.