1962. Johannes Leinert (Jan Bülow), together with his doctoral advisor (Hanns Zischler), travels to a physics congress in the Swiss Alps, where an Iranian scientist is set to reveal a "groundbreaking theory of quantum mechanics". But when the physicists arrive at the five star hotel, the Iranian guest is nowhere to be found. In the absence of a new theory to be discussed, the physics community patiently turns to skiing. Johannes, however, remains at the hotel to work on his doctor’s thesis, but soon finds himself distracted, developing a special fascination with Karin, a young jazz pianist (Olivia Ross). Something about her seems strange, elusive. She seems to know things about him - things that he thought only he knew about. When one of the German physicists is found dead one morning, two inspectors arrive on the scene, investigating a homicide case. As increasingly bizarre cloud formations appear in the sky, the pianist disappears without a trace - and Johannes finds himself dragged into a sinister story of false memories, real nightmares, impossible love and a dark, roaring mystery hidden beneath the mountain.