Hubert and Girwidz just want to return little Fabian's soccer ball, which ended up in a stranger's garage. But there they find not only the ball, but also the body of real estate agent Thorsten Falk.

After a life-threatening police operation in Wolfratshausen, Hubert and Girwidz try to take their minds off things on a joint mountain tour. In Ödweil, the two set off for the southernmost point of Germany. At boundary stone 147, their break is finally over.

Hubert and Girwidz come across two corpses, one on the German side and the other on the Austrian side. Their attempt to roll the corpse on the German side across the border fails embarrassingly: Susanne Gabler and Franziska Haas from the Austrian Alpine Police catch them in the act.

Both pairs of investigators decide to take care of "their" corpse first. But police chief Sabine Kaiser and Austrian police chief David Pichler order the two duos to work together on the investigation. At first, the cooperation does not seem to be off to a good start.