This romantic "mountain film" takes place on Mont Blanc, where the meteorologist Hannes (Sepp Rist) resides in an isolated observatory. Hella Armstrong (Leni Riefenstahl), who lives in the valley below with her astronomer father (Friedrich Kayssler), sees Hannes's observatory while flying over it in an airplane with stunt pilot Ernst Udet (who plays himself). She subsequently visits Hannes and the two fall in love. He urges her to visit his ailing musician friend Walter (Mathias Wieman), but when she does he starts to fear that they have become lovers. The distraught Hannes decides to stay for another year of work on Mont Blanc, but his hands freeze when he loses his gloves and is caught in a storm. Unable to build a fire, he tries to descend to safety but the cracks that have formed in the glacier compel him to turn back. Hella picks up his mayday message on the radio in her father's observatory and heads to Mont Blanc with a rescue team. Before she reaches Hannes, Udet is able to fly in and save his life by building a fire. 30/110