Part I: The dwarven sky citadel of Janderhoff in eastern Varisia is one of the least visited settlements in the land, at least by non-dwarves. Nevertheless, the Pathfinder Society has been invited to assist in the excavation of a forgotten ruin within the large underground complex. What the fearless adventurers stand to find within could be the greatest discovery of the Age of Lost Omens, something sure to immortalize all involved in the pages of the Pathfinder Chronicles for ever more. But the ruins under Janderhoff aren't the end of the Pathfinders' journey; rather they illuminate a treacherous path ahead, from the familiar land of Varisia into much more dangerous territory.
Part II: The Pathfinder Society has discovered the hint of a monumental revelation, but in order to confirm their find, they must send a team of agents into the dangerous and unwelcoming orc-ruled Hold of Belkzen. While an expedition could easily be dispatched to the orc capital of Urgir, the Decemvirate urges caution to ensure success. Thus, a team of Pathfinders must seek out a guide in the Varisian orc city of Urglin. Can they navigate the treacherous city of denizens who wouldn't mind seeing them dead, or will the orcs' Second Home be the site of their final mission?
Part III: Deep beneath the orc city of Urgir in the Hold of Belkzen lie the ruins of the ancient dwarven Sky Citadel of Koldukar, where awaits what could be the greatest discovery of the Age of Lost Omens: confirmation of the location of one of the lost Sky Citadels, built by the dwarves in their earliest days on the surface of Golarion. But reaching their destination won't be easy for the Pathfinders, and only the most skilled will survive Urgir and the terrors guarding the dwarves' long-abandoned secrets. Can they uncover the location of the lost Sky Citadel, or will the Pathfinders suffer the same fate as Koldukar—defeat at the hands of ruthless orcs and centuries of decay under the earth?
