From the introduction: The Tomb of Horrors is a small dungeon, diabolically populated with traps, misdirection and monsters. Only the strongest and best equipped adventuring parties have even the slimmest chance of surviving the protections with guard the crypt of the Lich who awaits within. Of course, by the time any D&D party has reached this sort of level, even an initially unified group of characters will have been riven and sundered by the trials of a career of murder and looting. This playset is about those rifts in the party. Oh yes, it's a Fiasco alright!