A Southern California kid named Calvin Fuller is magically transported to the medieval kingdom of Camelot through a crack in the ground caused by an earthquake. Once there, he learns he was summoned by the wizard Merlin, who needs Calvin to save Camelot. Using dazzling modern inventions, can Calvin help King Arthur retain his crown and thwart the evil Lord Belasco?

Calvin, a young pizza delivery boy, is mistaken for the "Great Deliverer" by Aladdin, an eighth century genie imprisoned in a lamp. Thinking that the boy is his only hope for deliverance, the genie lures him back to the eigth century where he must join forces with Ali Baba in order to save Aladdin from the evil hands of Luxor.