Before the police station in Ober-Himmelbrunn is dissolved, the local landlord reports a burglary. The young gendarme Thaler is assigned to solve the case. Disguised as a holidaymaker, he goes to work. In the process, he conquers the hearts of twelve attractive girls who want to spend their holidays in an alpine hut.
Franz, a Tyrolean mountain farmer's son and passionate poacher, loves the beautiful Sanna. A hunter, who is also interested in her, catches Franz poaching, shoots him and leaves him alone. On the way back to the valley, he falls into a crevasse and dies. When Franz returns home seriously injured by the shot, he is mistaken for the murderer of the missing hunter and is put on trial. Although he is acquitted for lack of evidence, the village community cannot prove his innocence. Everyone turns away from Franz, only Sanna sticks by him. They live in seclusion with their two children on a farmstead. Only when the children get lost in the mountains at Christmas time years later can the supposed murder case be solved.
Dr. Wittich is a passionate speleologist who spends more time on his research than on his fiancée Cornelia. As a result, she turns to the rich industrialist Roy, whom she eventually marries. But her heart actually belongs to the explorer and so she is drawn back to him.