In the idyllic Kleinwalsertal, a murder has occurred at Schneiderküren, a mystical place at an altitude of 1,500 meters. At the same time, a dead woman was discovered in the Hölloch, the deepest cave in the Allgäu, in the neighboring Bavarian Mahdtal. The proximity of the crime scenes necessitates close cooperation between the German and Austrian police, with Chief Inspector Wanner from Kempten and Department Inspector Brugger from Hirschegg. Strange phenomena on the Gottesacker plateau contribute to establishing a connection to the Middle Stone Age, adding an unexpected twist to the case. For a long time, the investigators are left in the dark. They must ascend to the geologically fascinating but difficult-to-access Gottesacker plateau as part of the search. There, the resolution takes place.