Desi is a witch. And she knows she could be a great witch--if only her mom would teach her any spells. Unfortunately, Desi's mom is more concerned with keeping them safe and their abilities hidden.

When her mom leaves town under mysterious circumstances, it should be Desi's perfect opportunity to explore magic on her own. But Desi has been left in the care of the most unusual babysitter of all time: her pet cat--also her mom's familiar--now transformed into a teenage girl named Cat. And Cat has only three goals: Learn how to eat sushi with her new hairless monkey paws, get the awkward boy...