In The Endless Stair, a mysterious doorway opens in the rocks atop Glazar's Crag, and the player characters go to see what is on the other side.
The Great Mage Cheiromar is said to be buried under the Leaning Stone atop Galzar's Crag. One of his apprentices, Ulthorn, has been discovered dead in an aperture of the Leaning Stone, a doorway that has reportedly never existed before. The player characters must discover how Ulthorn died and the mystery of the Leaning Stone. In the process, they may find the Endless Stair, which seems to lead to nowhere, although those who have tried to climb it never lived to tell of it.