[1] In 1934 Universal made an American remake Madame Spy in Hollywood with Fay Wray and Edward Arnold and directed by Karl Freund.

Captain Herbert Frank (Gustav Fröhlich), a German intelligence officer, fights in World War I and gets severely wounded in 1916.

But just a few days after their wartime wedding, her husband is commanded to Berlin, where he is appointed to the chief of the counterintelligence service against Russia.

Frank and his two assistants, Captain Weber and Inspector Schulz, soon find out that the most dangerous agent on the Russian side is a certain Sulkin, whom nobody seems to know.

But Maria manages to escape, while her brother, whom she had informed about her work for the secret service, is killed by the Russian counterespionage.