Blackbeard, the Pirate

Robert Maynard is out to prove that privateer Sir Henry Morgan is a pirate, and goes undercover on another pirate ship in hopes of getting details of Morgan's crimes. But the ship he chooses is captained by the ruthless Blackbeard, who killed the previous captain and took his bride-to-be, Edwina, hostage. Now Maynard must fight to free himself and Edwina from both Blackbeard and Morgan, who also wants Edwina for his own.