Completing this documentary-style gem under dangerous conditions during the final months of World War II, dogged filmmaker Rene Clement tells the story of a group of French railroad workers who organize to resist the Nazis. A cast of amateur actors -- including Marcel Barnault, Jean Clarieux, Francois Joux, Pierre Latour, Jean Daurand and Fernand Rauzena -- add to the realism of this acclaimed wartime drama.