The adults of Blarney have always lived in fear. The faeries of Tir na nOg exist on their doorstep, and they could unleash terror on the mortal realm at any time. But eleven-year-old Maddy is not afraid. The unicorn that holds the key to balance and peace in both worlds is injured, and Maddy knows she is the only one who can track down whoever hurt her. Can Maddy survive the force and cunning of the Tuatha, who rule Tir na nOg? Or will she end up a mere pawn in their own power games?