King Arthur has fallen in battle and a curse has caused darkness to fall upon his kingdom. In order to heal the land, Merlin and Morgaine le Fee need Slaine to retrieve the lost Treasures of Britain - magical artifacts also being sought out by the Saxon plunderer Hengwulf. These powerful items are defended by the demon-like Cyth who harvest human misery in order to revive their masters, the Dark Gods of Cythraw!