At the Alpine Museum in Bern, a break-in occurred, and the valuable collection of Eugénie Goldstern was stolen. The centerpiece of the collection, the "Bessaner Teufel," has also vanished without a trace. In the ice of Lake Oeschinen lies a spring corpse. Additionally, questionable events are happening on the Faldumalp in the Lötschental - a critic of a planned luxury resort falls to his death during a site visit. The Müller & Himmel detective agency begins the investigation, and soon the question arises: Is the wolf witch to blame for it all?.