One Evil. In exchange for power and immortality, they watch over the Endless Woods and rule the School for Good and Evil. Yet all School Masters must face a test. Theirs is loyalty. But what happens when loyalty is corrupted? When the bonds of blood are broken? Who will survive? Who will die? And what will become of the school and its students? The journey that started a hundred years ago throttles towards its end. This final chapter in the duology that began with the Rise of the School for Good and Evil brings the tale of the twin School Masters to the brink of war and a shocking conclusion that will change the course of the school forever.