When a Qadiran Pathfinder known for her knowledge of genie-kind fails to report back to the Katheer Lodge, the PCs are sent into the long-abandoned ruins of Koor, a former forge city high in the Zho Mountains. In their effort to find the lost agent, the Pathfinders may find themselves facing a foe long locked in a secure vault by the city’s former occupants—guardians whose departure weakened their defenses, paving the way for a terrible escape.