Scylla the Wicked Witch has used her magical powers to capture Hugo in a mirror. His three children, Trollerit, Trollerat and Trollerut must set him free. Scylla has broken the mirror into three pieces and spread them to the farthest depths of Tricky Troll Forest. To break the spell, each of the young Trolls must recover a piece of the mirror and put it back together again so that Hugo can become a free troll again.