Captain Hardt (Conrad Veidt), a World War I German submarine commander, is ordered to lead a mission to attack the British Fleet at Scapa Flow. He puts ashore on the Orkney Islands to meet his contact but finds more than he bargained for in the local schoolmistress (Valerie Hobson). The film was named by the National Board of Review as one of the Top 10 films of 1939 and is also the first collaboration betweener Michael Powell and Emeric Pressburger and is based on the World War I spy thriller U Boat 29 by Joseph Store Clouston.
