Tensions Erups in the owl kingdom when the forces of evil wage war the forces of evil wage war against the protectors of good. Enraged by his clash with Soren and driven by an all-consuming disire for power, Kludd and his group, the Pure. Ones, launch and attack upon the Great Ga'Hoole Tree. The noble owls who live there must fight fiercely to protect their resources and defend their honor.
Meanwhile, Soren is called upon by the elders of the great tree to lead a mission back to the one place he thought he'd never see again St. Aegolius Academy for Orphanded Owls. He and his crew will have to enter St. Aggies's as spies, then leave unnoticed once their work is done. Soren escaped the rocky confiners of St. Aggie's once. If peace is to be restroed, he must do it again.