At a mine on the shared edge of France and Germany, an underground explosion leads to the entrapment of a group of French miners. In an effort to save the trapped Frenchmen, German miners Wittkopp and Kasper take it upon themselves to traverse a crumbling war tunnel leading down into the mines. Yet, though the workers harbor no political biases against one another, their callous, less tolerant bosses hope to halt this cross-cultural rescue mission.
Gusti Aigner and Franz Lenhardt are in love, but composer Lenhardt is too shy and bashful to go out and sell his compositions to music publishers. Gusti takes the burden on herself; and while there are complications and humorous situations she runs into.
