Raken, the most powerful wizard ever to live, sends the Horseman of the Plague to crush Fantaghiro’s kingdom with his power, sending all the inhabitants into an eternal sleep. Only Fantaghiro stays awake, watching in desperation how Romualdo is kidnapped. Fantaghiro joins forces with the witch Xelexia's son Tarabas, a young wizard who has fallen in love with her and an old acquaintance of hers, and they go to Raken’s underground kingdom.