A Viking Fairy Prince has lost his sword in the great Viking Battle of AD 873. He attracts the attention Ping and Twang by having his Viking fairies fill Twang with arrows. Along with human twins James and Gillian, Ping and Twang help the Prince retrieve his Sword. They sail in a Viking Long Boat to English shores. if they retrieve his magic sword he will win the Princess he has been engaged to for 300 years.