When the movie starts developing itself, you get what is it about, but even though you know what you are watching, the movie keeps unpredictable. It puts you in situations that you wouldn't normally, and plays with your feelings with tension that you create with his sutiles suggestions. The movie has a great acting, casting and direction. Not everything is perfect but of course it's a masterpiece, very underrated in those days where you have to bem political to be good.