Eleven-year-old Holly Shepard longs for adventure, some escape from her humdrum life. That is precisely what she gets when she is given an old iron key that unlocks a door--in a tree.

Holly crosses the threshold into a stunning and magical medieval world, Anglielle. And as she does so, something unlocks within Holly: a primal, powerful magic. Holly is joined on her journey by two tagalongs--her younger brother Ben, and Everett, an English boy who hungers after Holly's newfound magic and carries a few secrets of his own.When Ben and Everett are sentenced to death by the royals, whose fear of magic has fueled a violent, systemic slaughter of all enchanted creatures, Holly must save them and find a way back home. But will she be able to muster the courage and rise above her ordinary past to become an extraordinary hero?