Pursued by the dark forces of the necromancer Heinrich Kemmler, Gotrek and Felix arrive at Castle Reikgard, where they must hold out against the zombie hordes. The brutality of the siege is unremitting as wave after wave of horrific creatures, led by the undead champion Krell, attempt to take the walls. With supplies running low and morale sinking, the defenders begin to hear terrible whispers and endure awful nightmares. Suspicion and paranoia run rampant within the castle walls, and the defence seems impossible. Somehow Gotrek and Felix must unite the forces of the Empire against Kemmler's ever-growing legion.