An ancient malevolence that will threaten the very existence of the Great Ga'Hoole Tree has been loosed from the past. With his dying breath, Ezylryb tells Soren and Coryn to read the legends of Ga'Hoole hidden in his private library. There they find a world of treachery and magic in which a young king and queen struggle to keep peace while Grank, their most loyal friend and supporter, studies embers and flames in a distant land. Then a desperate plea comes from the king, and Grank rushes to the aid of his noble friends.