Double Crossbones

Donald O'Connor stars as Davey Crandall, a shopkeeper's apprentice falsely accused by corrupt Governor Elden of Charleston of fencing stolen pirate booty, who finds himself alone on a ship with friend Tom Botts (Will Geer) after they fake a case of the pox to avoid being killed. They then mistakenly become pirates and recruit notorious corsairs like Henry Morgan and Blackbeard to lay siege to Chaleston and expose the villain Elden.