Swashbuckling pirate film, based on the novel by Rafael Sabatini, stars Power as James Waring, compatriot of notorious buccanneer Henry Morgan (Cregar). Morgan is pardoned and sent to Jamaica as its new governor--if he can prevent his from associates from continuing their criminal ways. He enlists Waring to help him fight the renegades; meanwhile Waring falls in love with former governor's daughter Margaret (O'Hara). Lots of derring do.