Sarah's brother has embraced the dark arts, vowing to destroy the Nine Kingdoms, and she doesn't have the power to stop him. Now she must risk everything to thwart his plans, even though she fears the quest will reveal the secret she's kept all her life.

After seeing his entire family slain by magic, Ruithneadh swore never to use his power again. But when Sarah pleads for his help, he's thrust back into a life of enchantments and peril, and a quest capable of unraveling the entire fabric of the Nine Kingdoms.