In a time of superstition and magic, when wolves are seen as demonic and nature an evil to be tamed, a young apprentice hunter comes to Ireland with her father to wipe out the last pack. But when she saves a wild native girl, their friendship leads her to discover the world of the Wolfwalkers and transform her into the very thing her father is tasked to destroy.

Éiru is the smallest child of an Iron-Age clan. All she wants is to be a mighty warrior who is taken seriously by her kinfolk. But when the village’s well mysteriously dries up, only she is small enough to descend into the belly of the earth to investigate and bring the water of life back to her people. Éiru is the story of a child in search of a quest, and a goddess in search of a champion.