When we went to watch it with my friend, we both had no idea what it was about. Honestly I picked it just because they have a great cast. We were not disappointed. It's a little bit on a dark side, especially at the beginning, but that's what suspense is about. If you like that kind of movies which ends up totally unpredictable - it is for you! Plus I love Rooney Mara - she is really good at playing mentally confused characters. Well done!