The pupils seek out and find Merlin, and he'll teach the pupil Presto magic, if he stays with Merlin. Presto decides to stay and attempts a spell to create a way home, but the spell summons dragons instead which attack a nearby village.
The children encounter Merlin the Magician and learn how he saved the town of Helix from a herd of marauding dragons. Presto decides to become Merlin's apprentice, but in his attempt to find a spell which could send his friends and himself home, he unleashes the dragons upon Helix once more.