It is up to the three Favorites, Penny, Luke, and Natalie, to rescue Mr. Leery from the Queen of the Boggarts, as they use the help of Kirin, a unicorn, Dracula, a dragon, and Buttercup, a rat, to cross over to the land inside the magic.
When Penny, Luke, and Natalie return to Morgantown they find that Principal Bender, their teachers, and most of the other adults have changed, and they fear that it may be a new plot by the Queen of the Boggarts to take over the world.
Natalie is surprised to learn that her classmates Penny and Luke are apprentice Keyholders, protecting the border between the real and magical worlds from goblins sent by the evil Queen of the Boggarts. Natalie is even more surprised to find out that she could be a Keyholder, too, if she forms a link with a rat named Buttercup. Will Natalie choose to join the Keyholders?