In this espionage film, a Danish double-agent is assigned by the Nazis to sneak into to England and abscond with the secret plans for a European invasion. Unbeknownst to the Nazis, the man is really and agent for the Allies. He is pursued by an English agent who exposes him. She then takes part in a plan to trick the German navy into leaving the port with fake documents. The ruse works. Unfortunately, the double-agent dies. ~ Sandra Brennan, All Movie Guide