For a long time, he has been looking forward to it: Martin Keller and his friends are going on a ski tour in the wintry Silvretta. Although he reluctantly left his heavily pregnant wife Natalie behind, he is now enjoying the magnificent winter landscape at Bielerhöhe. Together with his old friend Kurt and the mountain guide Hias, they ascend to the hut. At the same time, a cash transport is being robbed down in the valley near St. Anton. The perpetrators flee with their loot into the mountains, aiming to cross the Silvretta into Switzerland. But then an avalanche occurs. Martin Keller, the doctor, rushes to help - and is taken hostage along with his companions. What was planned as a leisurely tour now turns into a deadly nightmare. An exciting crime thriller set in the wintery mountains, which also sheds light on well-researched aspects of recent history, such as the construction of the Silvretta dam.