Amy and her class of school friends have a project trip to Cornwall where three of the boys fall down a pothole inside a cave. As their teacher tries to rescue the boys, Amy and Jessica slip in the sand which carries them back in time, to ancient days where they have to rescue the boys who have arrived there too and have already been captured and taken away and locked in the dungeons of a castle.In this magical land, the youngsters fight Cordren the witch and her family.A dragon is chained inside a stone circle and a very young Merlin helps Amy, Jessica and the boys to head home to their time.Arthur who will be the legend King one day and his knights are still young boys and so an adventure happens.Katie with her camera also arrives to help all the youngsters.This story is written with British spellings.