Bim seems to be his town's biggest loser, but when he takes a needy 13-year-old boy named Bill under his wing, it seems there may be some hope for Bim. After learning about Bill, a young teacher, Mary, whom Bim secretly adores, helps get the young boy into school. And when Bim then helps Mary repay a loan, defaulted on by shifty boyfriend, it becomes evident that Bim can reform. As the plot in this captivating film twist and turns, the stakes get higher, the action gets more intense and hope for Bim bounds upward.

Yvonne von Krutz, a Belgian, lives with her German husband Karl, whom she was forced to marry, and her spirited little brother Jacques in a farmhouse on the Belgian countryside. With the German invasion of Belgium, Karl joins the German forces, and Jacques is taken to a reformatory to be trained as a munitions worker. When Karl is taken prisoner, Capt. Jefferson Strong, an American engineer, assumes the German's identity and discovers an underground supply of explosives near the von Krutz farm. By means of a tunnel, the Americans plan to mine the explosives. To save Jacques and a group of children from the munitions factory, however, Jefferson sends them across the American lines through the tunnel, but they lose their way, and he is forced to disable the mine. Jefferson is court-martialed, but King Albert of Belgium, who has befriended little Jacques, intercedes on his behalf. Learning that Karl has been killed, Jefferson pursues his budding romance with Yvonne.