Discworld's last continent, a completely separate creation, is a hot, dry place where everything is poisonous. All that stands betwen this place and wind-blown doom is Rincewind, an inept wizard who is the only hero left.

The Hogswatchnight yuletide season is disrupted by the evil deeds of the Auditors, who replace the red-suited Hogfather with a scythe-bearing demon, prompting the Unseen University wizards and their monster-bashing nanny to launch a rescue plan.