The adventures of "The Pirate Captain" and his crew of non-orthodox pirates. They meet a young Charles Darwin and Mister Bobo, a highly trained and sophisticated "man-panzee", who have been exiled from London by a rival scientist. Having sunk The Beagle, which he believed was a Bank of England treasure ship thanks to a tip-off from Black Bellamy, the Pirate Captain agrees to take Darwin home and help him defeat his enemies.