When in the Alps, exactly on the German-Austrian border, a cruelly staged corpse is found, the two countries send two investigators to clarify the case. For Ellie Stocker (Julia Jentsch) from Berchtesgaden, this is the first major challenge of her career, while the colleague Gedeon Winter (Nicholas Ofczarek) from Austria seems to have long since completed his cops. Very soon, more, symbolically arranged at the scene bodies are found. For Ellie and Gedeon there is growing pressure to understand the serial-maker's motives in order to stop his activities. In their hunt, they not only penetrate ever deeper into the dark valleys and archaic customs of the region, but also into the delusional world of the murderer.