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.
Fred Cromwell
Bill 'Jellybean' Cook
Dorothy Gray
Henry 'Hank' Davis
Lafe Johnson
Dr. Flint
Collins
Bracken
Stephen Gray
Sheriff
Tom
Andrew Martin
Carter
Roberts
