A newspaperman suspects that a famous aviatrix is using her pacifist speeches to broadcast encoded shipping information to enemy spies. With the help of the pilot's sister, he sets out to expose the spy and her Nazi ring.

Pamela Mitchell is a famous sport pilot (a "flyer") who uses information supplied by her boyfriend to enable enemy submarines to sink American ships. Newspaper columnist Ward Prescott becomes suspicious and, with the aid of Pam's sister, Sue Mitchell, exposes Pam and a gang of Nazi saboteurs.—Les Adams <[email protected]>