A Pathfinder Society Scenario designed for levels 1-5. The Thuvian city of Merab has grown steadily over the past decade, and construction teams have uncovered numerous foundations and features dating back to Ancient Osirion and the Tekritanin League as they break ground for new buildings. Recently, workers accidentally unsealed a haunted ruin, out of which screamed a terrifying apparition. The Society has sent the PCs to investigate, not only to learn about the newly discovered ruin, but also to put this angry spirit to rest. In the process, the Pathfinders will uncover more than part of Thuvia's past; they'll unravel a dire secret that even now threatens one of the Society's closest allies. Contents in The Unseen Inclusion also contribute directly to the ongoing storyline of the Scarab Sages faction.