Alex is digging for buried treasure, when Timeblazers Jen and Sam tell him that his pirate's map is a fake. To help him better understand fact from fiction, they head back to ancient Greece and Plato, who made up the story of the mythical island Atlantis. Next Alex learns that the story of King Arthur and the Round Table is just a good story, written by Geoffrey of Monmouth; also that the Sword Excalibur and Merlin come from Celtic myths and legends....