King Arthur decides to invade Scotland when he discovers Princess Guinevere has been taken to Hadrian's castle. Unfortunately, the King's armies are accidentally sent in the wrong direction so Arthur is left with only four men to help him lay siege to the castle. Merlin levitates them over the battlements but Guinevere is nowhere to be found. King Arthur searches the length and breadth of Scotland only to discover Guinevere might not have been taken prisoner after all... so where on earth is she?