When a doting father decides to make an apple pie for his beloved daughter, an enjoyable day is had by all, including the hungry farm animals who hover nearby in the hopes of getting a slice of the pie.
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.
Ten-year-old Emmy wants to be an ordinary girl, but the evil nanny Miss Barmy, now a rat, has trapped five of her former charges and when she uses them to steal jewels belonging to Emmy's parents, it is up to Emmy, Joe, and their rodent friends to stop her.