In this sequel to The Lost Warrior, Morgan Caeda continues his quest to uncover the secrets of the Mhoul. Morgan and his companions enter the mysterious forests of Aijalon where some of them are captured by Mhoul soldiers and taken to the citadel Ragoulgard. After escaping from Ragoulgard and the cruel experiments of the Mhoul scientist Dragoslav, they journey to the subterranean city of Shieldaig. To penetrate the defenses of the Mhoul capital Morgan and Maximilian must survive the labyrinth of Cnoc Thor and its deadly guardian. In the end, Morgan faces his worst fear, the return of the Lucca.