1/2 half got very bad

I really like Franka Potente as an actress which made me look into this film. I like a lot of German cinema but I was quite disapointed at the 2nd half of the film. It started off great but in the 2nd half, all this secret fraternity/society really ruined the film for me. It became too outrageous with all this killing left and right in a medical university.

It became really silly as Paula's actions become stupid (she was smart at the beginning but them became more and more foolish) and the killers were ridiculous. Shame. It could have been great.