Third-grader Katie Carew gains insight into the thinking of the class bully when she is magically transformed into a hamster--an animal the bully fears.
When Emmy discovers that she and her formerly loving parents are being drugged by their evil nanny with rodent potions that can change people in frightening ways, she and some new friends must try everything possible to return things to normal.
Fourth-graders Hank, Ashley, and Frankie are excitedly preparing for a magic show at the Rock 'N Bowl when Hank's creative alternative to an English essay lands him in detention and grounded the week of the show.
The Bailey School kids decide to investigate when they begin to believe that the new piano teacher who lives in a castle is really a knight planning to take over the city.