This French thriller, a 2002 Cannes File Festival award nominee, grabs you by the guts and twists.....hard. It contains one of the most brutal rape scenes I've ever seen in films, and while it's not a pleasant film, it's amazing and very well done. Monica Bellucci did an incredible job in handling that scene, which had to be as unpleasant for her as it is for the viewer.
Even if you don't speak French, you will ignore the subtitles because you'll become so engrossed in the movie. It tells of the rape of a young woman, and the downward spiral as the woman's boyfriend and ex-boyfriend track down the rapist to enact revenge. It also contains a very unique twist which I won't spoil by revealing, but just remember, the title is "Irreversible", and so is the movie.