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.
DIRECTOR
CAST
Bob Steele
Fred Cromwell
Guinn "Big Boy" Williams
Bill 'Jellybean' Cook
Lucile Browne
Dorothy Gray
Jack Mulhall
Henry 'Hank' Davis
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