Drummond goes up against foreign agents who are trying to steal plans for a top-secret aircraft.
Hugh "Bulldog" Drummond
Doris Thompson
Gregoroff
Algy Longworth
Caldwell
Ivan Kalinsky
Major Grayson
Meredith
Veight
Norah
Mrs. Caldwell
Dr. Belfrus
Reginald Portside
Reporter
Conrad
