A nobleman vows to avenge the death of his father by the hands of pirates. To this end, he infiltrates the pirate band; Acting in character, he single-handedly captures a merchant vessel, but things are complicated when he finds that there is a beautiful young woman of royal blood aboard.
Douglas Fairbanks
as The Duke of Arnoldo / The Black Pirate
Billie Dove
as Princess Isobel
Anders Randolf
as Pirate Captain
Donald Crisp
as MacTavish
Tempe Pigott
as Duenna (as Tempe Pigett)
Sam De Grasse
as Pirate Lieutenant
Charles Stevens
as Powder Man
John Wallace
as Peg-Leg Pirate
Fred Becker
as Pirate
Charles Belcher
as Chief Passenger - Nobleman
E.J. Ratcliffe
as The Governor
Nino Cochise
as Pirate (uncredited)
