Great among the terrifying legends of Avalon is that of the Long Night, when the light of the golden sun and silver moon was blotted from the heavens and Avalon cast into the blackest darkness of despondency. Agammenion, the Count and first master of the Sorcerer's arts, devised the plot which brought upon this terrible cataclysm, in order that he could terrify his foes into submission. Fortunately his efforts were foiled by the upholders of light, who managed to end the darkness and then scattered the artefacts of the arcane ritual. Now, centuries afterward, others seek to inherit the Count's legacy. The Star-Sorcerer Pangyron is chief amongst them, for he alone has the knowledge and great might requisite. He wishes to increase his power to such an extent that none will be able to stand in his way.
Living in the Under-deeps, guarded by the staunch Thaumacians, is the Black Demon, dark-sister to the life-giving Sun. Pangyron intends to free the demon from this prison, and using his power and that of the Demon, to banish the Sun from the sky and replace it with the Demon who will ensure everlasting night. His allies, the members of the Night Cult, work towards this aim, to knit the heavens themselves with utter darkness. Working against these foul machinations are the noble members of the Order of the Sun and Moon, led by the druidical Seer Orestes. Their tireless efforts have held Pangyron and his minions back from plunging the land into endless darkness, yet the persistence of the Cult is great and some would say it is only a matter of time.