Sabrina's zany Aunt Vesta pays her a visit and soon hatches a plot to entice her niece into moving to the Other Realm.

Sabrina, tired with Libby's constant teasing, turns her into a nerd to show her what it feels like to be picked on. But instead of learning a lesson, Libby shows her true colors and takes over the Science Club, making them into a group of jerky teens who look down on everyone else (just like her old cheerleading squad). To solve the problem, Sabrina uses a similar spell to turn the whole student body into nerds, keeping Libby from enjoying her prestigious position.