After accidentally killing a dragon, Wiglaf hopes his friends at Dragon Slayers' Academy will be able to help him prove himself a hero when he faces that dragon's mother, Seetha, the Beast of the East.
Wiglaf wins a contest that brings Sir Lancelot to the Dragon Slayers' Academy for a day, but when Wiglaf's friend Erica suspects that Lancelot is not who he claims to be, trouble ensues.
Wiglaf joins the other students of Dragon Slayers' Academy in searching the Dark Forest for the Cave of Doom, which supposedly contains the gold of the dead dragon Seetha.