Zuli is an extraordinary girl—she just doesn't know it yet. Raised by mystical bird spirits living high among the branches of the Great Tree, she has no idea what awaits in the world beyond her safe haven. But when a sinister force threatens the life-giving magic of the tree, Zuli must venture out with her guardian owl, Frowly, to get to the root of it. So begins an adventure bigger than anything Zuli could have ever imagined—one that will bring her face to face with an ancient dragon, a terrifyingly powerful Witch Queen, and most surprising of all: her own true identity.