During World War I, Kervyn Guild, an American citizen who was born in Belgium, is captured with other Belgian refugees by the Germans. Brought before the commanding officer, General Von Reiter, Guild is offered his own freedom as well as that of the other refugees if he goes to London and returns with the officer's daughter, Karen Girard, who actually is his mistress.

"The story of a young American who defied the German spy system and German treachery to champion the cause of little Belgium."