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.
1991
1925
1933
1937
1926
2008
1919
2021
1944
1924
1940
1913
1936
1949
2020
1950
2012
