A NASA spacecraft proves Einstein right when, travelling faster than light, it ends up near King Arthur’s Camelot. On board are big-hearted Tom Trimble and Hermes, the look-alike robot he built. Tom immediately makes friends with pretty Alisande and enemies with the awful knight Sir Nordred. It seems Nordred is out to oust Arthur, while Alisande’s father is not the goose she believes him to be but is also a victim of Nordred’s schemes. It’s as well the Americans have arrived.
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?