The deepest parts of the Pathfinder Society's collection of artifacts was once maintained by an entire faction: the Dark Archive. However, as factions changed and roles shifted, the Dark Archive shuttered, leaving the maintenance of this area to Zarta Dralneen, previous faction head and now head archivist of the Society. She's called upon a group of Pathfinders to enter into the deepest areas of the archive not only in search of an artifact that may help in the war with Cheliax, but also to reseal the magical fortifications around the archive, though it seems as though someone is already aware of the weaknesses within the Society...