Marlene Dietrich is Agent X-27, the Mata Hari of Austria, in this exciting tale of espionage and romance, also starring Victor McLaglen. A widow forced to turn to prostitution to support herself, Dietrich is solicited by the Austrian Secret Service to become a special agent. With her ample charms and extraordinary beauty, she ferrets out secrets from the enemy, saving thousands of lives and altering the course of the war. But she meets her mental match in a Russian agent named Kranau (Victor McLaglen), who continually outwits her and proves to be her downfall. Dietrich pays the ultimate price for falling in love with the debonair spy in this Josef von Sternberg hit.