Howard W. Campbell Jr., an American living in Germany since childhood, is recruited by the United States to become an informer during the upcoming Second World War. What he does become, is one of the leading anti-semitic news broadcasters of Nazi Germany. After the fall of Hitler's Germany, Campbell's government friends arrange for a quiet life in the United States. His life is quiet until a complex web of spies and neo-Nazis draws him back into the life which he once led. Eventually captured by the Isralies, Campbell's one defense was: "I was an American Spy."