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
