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The Great Masquerade (also known as Murder on the Emerald Seas and The AC/DC Caper) is a 1974 American mystery comedy film directed and co-written by Alan Ormsby, and stars Kaye Stevens, Roberts Blossom, Gay Perkins, Frank Logan, Robert Perault, Paul Cronin, and Anya Ormsby. The film's plot follows a detective who infiltrates a drag queen beauty contest aboard a cruise ship in order to solve a series of murders. imdb.com