Growing up in the time of good King Arthur and living in a sleepy village in Wales, fifteen-year-old Moriah Jones seems an ordinary human girl, but appearances are deceiving. Abandoned by her fairy mother at her human father’s doorstep at birth, Moriah struggles to find meaning in her life as terrible tragedy befalls her village. Even more, Moriah finds out her best friend Gwen has gone missing.
Seeking the wisdom of her grandmother, a Romani seer, a tarot card reading tells what happened to Gwen. The cards do not lie, and they reveal that to obtain enough power to find her friend, Moriah must first drink from the fabled Cauldron of Cerridwen—an artifact created long ago by a sorceress of great power.
Moriah gathers the magic her grandmother taught her and sets out into the Banshee Forest. She finds her way into the land of the Fey through a legendary crystalline gate but soon finds that she is not the only one seeking the cauldron. Mav, Queen of the Fairies, seeks it too. Despite being hampered by monsters, mayhem, and unseen magical forces, Moriah is driven to save her friend, even if it means outsmarting a queen.