Even if she is on her own: Sonja Schwarz fights like a lioness for her husband Thomas, who is in custody on suspicion of murder. Evidence of his innocence is finally emerging. His daughter Laura and Jonas Kerschbaumer's brother Ludwig, who moves as a shepherd over the lonely alpine mountain routes, have a share in this. Through the two of them, the commissioner receives the decisive information that the murdered Evelyn Kronstadt owned a cell phone. Indeed: she finds the mobile phone hidden under a cupboard. The call list and intimate photos now direct the suspicion of murder to the local politician Stefan Keller. He had a relationship with the then 15-year-old. But is that why he was the culprit? The key lies in other unexplained murders of girls that are being investigated by the Bolzano police force. In addition, Sonja Schwarz, Jonas Kerschbaumer and Capo Zanchetti have to clear up the death of the landlord Grandl, who - apparently stunned - was run over by a tractor.