Stonekeep is a ruined fortress located near the city-state of Rihad, in the province of Hammerfell. Stonekeep was once the home of a group of peace-keeping knights that were governed under a King. But it would fall into disrepair when a group of Goblins, under the control of the necromancer, Golthog the Dark took over the citadel, after they raided the Dwarven mines of Fang Lair. They took tons of treasure, as well as, a parchment that contains the information needed to uncover Fang Lair. Both the King and Stonekeep had fallen to the Goblins and the few survivors went into hiding. The survivors gathered their arms and prepared to fight the Goblins in their caves. only to perish themselves. It was speculated that Golthog the Dark served the Underking.
During the Imperial Simulacrum in the late Third Era, the Eternal Champion had approached Queen Blubamka of Rihad, seeking out the ruins of Fang Lair and the first piece of the Staff of Chaos. Blubamka would ask the warrior to retrieve the parchment, in order to gain the Fang Lair's location. After delving into Stonekeep and acquiring the parchment, the Eternal Champion continued their quest.