 A resistance leader (Georges Rollin) is wounded when the Germans raid his underground printshop. He escapes to the home of a German-friendly Parisian (Guillaume De Sax) and is helped by her son (Andre Reybaz) and daughter (Suzy Carrier.) A Jewish doctor (Samson Fainsilber) also aids him. They all join him in his efforts against the Nazis and derail a munitions train.