Sherlock Holmes and Dr. Watson embark on a search for Cleopatra's ancient necklace, which has been stolen.
Julien Saint Dominique, an agent of the French counter-espionage service in Berlin, investigates the kidnapping of a functionary taken by German communists into East Germany.
In 1939 German U-boat captain Günther Prien receives orders to infiltrate the British Royal Navy base at Scapa Flow and sink British warships.
