Falsely convicted of murder, young Robert Draper escapes custody during a practice blackout drill. Under cover of darkness, Draper hopes to find the real killer, who turns out to be a member of a Nazi sabotage ring. Completed shortly before America entered WW2.

A beautiful Austrian refugee in England--who is also a Nazi agent--marries a scholarly English pacifist. He lives near a secret military base she needs to get information about so she can help in Hitler's planned invasion of England.

An investigator from the War Crimes Commission travels to Connecticut to find an infamous Nazi, who may be hiding out in a small town in the guise of a distinguished professor engaged to the Supreme Court Justice’s daughter.