In 1940, Welsh armaments factory foreman Fred Carrick goes to France on his own initiative to retrieve three large pieces of machinery for making cannon for Spitfires before the German army arrives. In Bivary, he requests the aid of two soldiers and, more importantly, the use of their army lorry. He also gets the help of the company secretary in France, an American woman who needs to go north to find her sister, a nurse. While in France, Carrick learns about the role of the
fifth column, and that even those in positions of authority, such as the town mayor, cannot always be trusted. During the race to the coast with the machines, he encounters a huge number of refugees fleeing the advancing Nazis and many more obstacles to hinder his progress. They take half-a-dozen orphaned children on their journey, entertaining the children with humorous songs. ==Cast==