Knowing that the Hogfather is also responsible for the sun rising, Death attempts to maintain belief by dressing up as the Hogfather and fulfilling his role. Since he is unable himself to defeat Mr. Teatime, who resides in a realm created by children's belief where death (and thus Death) does not exist, he appears at his granddaughter's place of work dressed as the Hogfather. As he had planned, Susan Sto Helit is unable to resist her curiosity and tries to find the Hogfather. She visits the Hogfather's Castle of Bones, only to find the hung-over Bilious, the "Oh God" of Hangovers. In an attempt to cure Bilious from his hangovers, Susan visits the Unseen University, where it is discovered that several small gods and beings (including Bilious) are being created due to an abundance of excess belief in the world caused by the Hogfather's disappearance.