Die Stimmen plot
Mona Seiler (Mariele Millowitsch) has just been promoted to head of the Munich Police Murder Department when a mysterious series of murders unfold. All the victims were students of a boarding school in Bad Issingen. However, when teacher Michael Danner (Alexander Lutz) is identified as the prime suspect, the case comes to a halt. Mona's colleague Florian Fischer (Max von Thun) is no great help either. Then Mona discovers that Felicitas Gerber (Ulli Maier), a psychiatric patient who was raped during her stay at a boarding school, has something to do with the case...