Publisher's blurb: A Starfinder Society Scenario designed for levels 11-14. At last, the Starfinder Society nears its goal of recovering the final data fragment containing one of the organization’s greatest secrets. Guidance, the Society’s guiding intelligence, dispatches a group of veteran agents to the mysterious planet Aucturn at the edge of Pact Worlds space. The PCs must survive the eldritch denizens and hazards of the Citadel of the Black while racing against a group of Hellknights who also seek the fragment.