RIDMARK ARBAN is the Gray Knight, questing to stop the return of the terrible Frostborn to the High King's realm. For years he has sought the secret of the Frostborn, and now the answer is at hand within the walls of the cursed citadel of Urd Morlemoch. For the Warden of Urd Morlemoch knows the secret. CALLIANDE seeks for her past, her memory lost in fog. She seeks to stop the return of the Frostborn, but the secret of their defeat is trapped within her damaged memory. The truth of her past awaits within the walls of Urd Morlemoch. For the Warden of Urd Morlemoch knows who she really is. THE WARDEN has been imprisoned within Urd Morlemoch for centuries beyond count, his potent magic chained behind its walls. But his final game is almost complete. And worlds beyond count shall tremble before his power...