After saving themselves and their fellow students from a life pitched against one another, Sophie and Agatha are back home again, living happily ever after. But life isn't exactly a fairy tale.

When Agatha secretly wishes she'd chosen a different happy ending with Prince Tedros, the gates to the School for Good and Evil open once again. But Good and Evil are no longer enemies, and Princes and Princesses may not be what they seem, as new bonds form and old ones shatter.

Witches and princesses now reside at the School for Girls, inspired to live a life without princes, while Tedros and the boys are camping in Evil's old towers. A war is brewing between the schools, but can Agatha and Sophie restore peace? Can Sophie stay good with Tedros on the hunt? And whose heart does Agatha's belong to—her best friend or her prince?