From the introduction: Under the Unfading Sultan's palace and the cobblestone streets of Aarthal lies a labyrinth of rooms and tortuous corridors plunged into darkness. That's where the frightful Unfading Sultan throws his enemies after carrying his libations to his sinister deity, the Crimson Sapphire Overlord, in the Red Chapel of the palace. And he has no need of prisons and gaolers given the unspeakable horror lurking in the dark... A blind and redfurred Minotaur which is an avatar of the Overlord, roams in the complex!