Joe Jefferson, a boy from the ordinary world (Earth), has been summoned to Muddle Earth -a medieval fantasy world "full of monsters, mayhem, and more"- by the wizard Randalf. He is then exhorted as a 'warrior-hero'. In other words, he must fight evil on behalf of Randalf, who has in turn been contracted by the ruler of Muddle Earth, the Horned Baron. The Horned Baron, however, has problems that even Randalf cannot attend to: his wife Ingrid is a very demanding woman.