The Trix want to get hold of the Dragon Flame, so they summon a shadow monster that can create terrifying nightmares during sleep. The monster approaches the fairies' bedroom and takes all their powers, becoming extremely powerful. But the fairies discover the monster and its intentions and Faragonda comes to help. Defeated once again, the witches return to CloudTower, where Headmistress Griffin punishes them with expulsion from the college.

The Trix attack Bloom again. During the fight, they reveal themselves to be the Ancestral witches who centuries before destroyed the world of Domino while trying to steal the Dragon Flame. Bloom is defeated and loses all her powers to the three witches' advantage… Could she really be the last princess of Domino?