
Hank Davis, foreman on a huge dam project, enlists the aid of his two flyer friends when a sinister figure known as The Black Ace leads his Mystery Squadron of masked pilots in an attempt to destroy the dam.

as Fred Cromwell

as Bill 'Jellybean' Cook

as Dorothy Gray

as Henry 'Hank' Davis

as Lafe Johnson

as Dr. Flint

as Collins

as Bracken

as Stephen Gray

as Sheriff

as Tom

as Andrew Martin

as Carter

as Roberts