When Venture-Captain Norden Balentiir learned that hordes of undead were rising from beneath his own lodge, the Sandswept Hall of Sothis, he feared that calling for help from Osirion's government would anger the Ruby Prince, resulting in the lodge being shuttered for good. Instead, he called for an elite team of Pathfinder agents to strike back against the undead incursion and find the source of the unrelenting horde. Thanks to this team's successful efforts, the Society knows how the undead are entering the lodge—but not how to stop them for good. Multiple Pathfinder agents have attempted to scout beyond the breach in the vaults of the Sandswept Hall, but thus far, they've learned little—and several haven't returned at all. Now, the venture-captain has called on another elite team to venture into unknown territory, rescue their lost companions, and put a stop to the attacks, once and for all.