The Girl from Havana (1929)

Joan Anders, a girl detective for a jewelers' protective association, poses as a chorus girl in a musical comedy troupe to capture a gang of jewel thieves. On a steamer from Los Angeles to Havana, Joan falls in love with Allan Grant, one of the suspected crooks. After the gang has been apprehended, Grant is revealed to be the son of a murdered jeweler who fell in with the gang to track down the murderer.