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.
1920
1919
1974
1949
1947
1915
1929
1946
1993
1945
1941
2013
1953
1950
1944
1977
2012
1917
2022
