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William C. Barton (Peter Van Eyck) is an Allied pilot who is shot down over Belgium during World War II. With the country crawling with Nazis, heroic resistance fighters try to smuggle William and some escaped prisoners of war into Spain, but when he is seen writing a letter with a German address, he is mistaken for a spy and shot. Marie Versini plays a member of the resistance, with Walter Rilla as her father. Fritz Wepper plays a U.S. pilot who is also shot down and tries to escape. The feature was awarded the Federal Film Prize in 1964 and was the country's official entry at the Locarno Film Festival.