(This review has been deleted based on an anonymous abuse report. I find nothing in it that would justify such an action and therefore humbly ask to revert that decision. I'd otherwise feel prompted to withdraw my rather numerous contributions here. If someone doesn't like the opinions I express in this review, feel free to tell me so in a comment or mail. Do not suppress other people's opinions.)
If you should have the incredible misfortune of having to sit through this thoroughly unwatchable film, you may find a little comfort in its answering the question why so many German films are equally painful to watch. After all, it shows how acting classes in Germany work, and if you sit this one out, you will not only be immunized to terrible acting just about anywhere, you will also realize why many good German films feature actresses who were not (yet) professionally trained - for example, Franka Potente (Run Lola Run) and Nina Hoss (Barbara) were cast for their first feature films when they had only just begun acting school.
As for the story, it is typical for the projects realized in a film industry which depends on state subsidies and public broadcasting: dull acting student gets cast by a sexist experimental theater director to perform as the nymphomaniac lead in his latest play, and gradually loses her psychological balance while having to deal with her Down-syndromed sister at the same time. You know, the usual 'poor girl suffers and gets sexually exploited' shtick. A love affair, which she initiates using her daring stage persona, doesn't save her. The prospective partner is played by Ronald Zehrfeld, who is making the best of an otherwise ridiculous script written by director Christian Schwochow and his mother.
Some people seem to like this sort of thing, but if you're under 50 and more into Tom Tykwer than Oskar Roehler - whose films evoke the same tedious Freudian boredom - you know what you want to stay away from. It's so terrible that, as a German citizen, I feel an obligation to apologize to non-German audiences forced to watch this prime example for the degeneration of our movie industry. Fortunately, there are still German directors - like Andreas Dresen - who work in more creative ways.