Im Nesseltal.

Told from the viewpoint of musician Nico, "Nesseltal' tells the story of a friend's 30th-birthday weekend in a secluded mountain lodge in the Alps. After the group falls out over an alcohol-fueled argument, the story takes a turn for the worse: not only has Nico disappeared, but the group also find themselves confronted by a much more terrible secret that their unfortunate weekend destination holds.