When Katie's best friend Callie leaves her for a clique called the Popular Girls Club on the first day of middle school, Katie decides to find a group that she can join.

Cupcake runs a successful bakery with his best friend, Eggplant, but dreams of going abroad to meet his idol, Turkish Delight, who is the most famous pastry chef in the world.

Forsynthia and her little sister Daisy bake their Mom (a scientist for the Secret Magical Bureau) cupcakes for her birthday. But they all get more than they bargained for when a cupcake merges with the magical artifact Mom has been studying and a villainous mega-cupcake forms, multiplies, and then attempts to take over their town of New Harmony! Will Forsynthia and family capture Megacupcake, save mayor Loren, put stop to the chaos, and save the day?...