Whilst the Germans scour a French town for saboteurs, the Mayor (Godfrey Tearle) and his daughter Marie (Greta Gynt) collaborate with the German Occupation. But unknown to both the Germans and the French villagers, they are leaders of the resistance organisation. When a young French idealist (John Clements) arrives without papers, Marie shields him from the Germans and enlists him in their cause to disrupt the German war effort and smuggle Allied airmen back to England.