The union of Prince Árd-Greimne of the Tuatha Dé Danann and Derbáil, the mortal princess of Dál Riata, was a quiet rebellion against the order of both their worlds. He, a being of radiant light and ancient power, and she, a woman of fleeting beauty and indomitable spirit, carved out a life together not in the splendour of a court, but in isolation on the mist-veiled Isle of Skye. There, at the edge of the world, they raised their daughter… Scáthach.