A hundred years have passed since the days of Edgar the Aethling. Abhartach, undead warlord of Ulster and servant of the Necromancer, has risen from the grave. A reluctant pair of adventurers, recruited into the Red Branch Knights, travel to the mystical world of Avalon on a quest to retrieve the only weapon powerful enough to defeat their foe. From the putrid lair of the Goblin King to the lost city of the Antediluvians, they seek the long-lost staff of Myrddin. The Necromancer has other plans in motion, and will soon control both worlds.