A group of young men who work at an aviation factory begin to suspect that a doctor who runs an air ambulance service is secretly a spy transporting secret information from the plant to enemy agents.

Leo Gorcey
as Muggs McGinnis

Bobby Jordan
as Danny Graham

Joan Barclay
as Helen Munson

Dave O'Brien
as Tom Lawson

George Pembroke
as Dr. Nagel

Sunshine Sammy Morrison
as Scruno

David Gorcey
as Peewee

Donald Haines
as Skinny

Eugene Francis
as Algy

Bobby Stone
as Louie