Gaston Vandermeerssche is a young, resourceful Flemish action hero of the Belgian resistance during World War II: he coaches surviving allied pilots trough occupied Belgium and France to Spain so they can regain England, each time a dangerous adventure as their poor mastery of local languages and customs add to the ever-present risks of trying to outsmart the Nazi troops and Gestapo agents. After a mess-up in the coordination from London he himself gets caught by the dreaded secret police for ruthless interrogation...