Enemy agents are everywhere and they are sabotaging all important war deliveries. The body of a hobo found in a train wreck had a money belt with $50,000 and a tattoo of a circle and arrow. This is a tattoo for saboteurs for hire and Brass must impersonate the dead man to find out what his orders are. As Steve Coe, he meets with the band of enemy agents in California and everything goes well until the wife of the dead 'Hobo' shows up. Luckily, Gabby is able to save Brass and Brass learns what is his assignment. He is to board the USN airship 'Mason', which is testing the super secret Inertia Projector, and destroy the airship.
Ronald Reagan
as Brass Bancroft
Eddie Foy Jr.
as Gabby Watters
John Litel
as Saxby
Lya Lys
as Hilda Riker
Frank Wilcox
as Jerry
James Stephenson
as Joe Garvey
Julie Stevens
as Naval Hospital Nurse
Helen Lynd
as Dolly
Robert Warwick
as Dr. Finchley
Victor Zimmerman
as R.G. Rumford
Charles Brokaw
as Otto Brennerman
John Hamilton
as Hargrave
