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.
1932
1933
1935
1915
1970
1918
1939
1936
1952
2011
1916
1927
1917
2020
1947
1954
1934
