Word from a missing Pathfinder agent makes its way to Decemvirate leadership, revealing that Hesla Embersplitter has not only staffed her manor home with cultists of the deceased demon lord, Deskari, but that she's also received an ominously large shipment from an unknown shipping merchant recently. Unable to convince the High Council of Absalom of Hesla's ill intentions, they turn to their agents to look into what's happening at Ember Manor in the Eastgate District and determine what this ancient artifact is and what she could be planning. Once inside the manor, agents quickly learn that the object is what remains of demonic corpse, protected by Hesla's fanatical Cult of the Screaming Grub!