Through American-German organizations such as the Bund, Nazi spies organize a network of agents and collaborators in defense plants, the military services and other occupations that gather classified information that is relayed back to Germany. F.B.I.-agent Renard uncovers key members of the nest of spies who are quickly brought to trial and found guilty. But before the trial ends, the audience is treated to the Nazi agents' attacks on the U.S. Government, the ideals of democracy and those who believe in the freedom of speech. Americans of German decent who disagree with the New Order are either beaten up by thugs or sent back to German concentration camps.