By becoming the King of the Horsemen, Eredin ushered in a new era for Aen Elle. His world, Tyr na Lia, began to slowly die from a mysterious force known as the White Cold. The only key to salvation is the descendant of Lara Dorren, Cirilla of Cintra, whose blood can open the gates to all worlds. For Eredin, Ciri is not a person, but an artifact, the legacy of his people, which must be returned.