Old Korvosa is under quarantine, a sprawling slum contained by roadblocks and guardposts manned by remorseless Hellknights and sinister plague doctors. While the rest of Korvosa stifles under an increasingly brutal martial law, the quarantined streets of Old Korvosa descend into true bedlam. Yet the one man who may hold the truth behind the perils that have brought Korvosa to its knees is lost inside the quarantine zone. Can he be rescued from the clutches of a new menace rising in the festering pits of Old Korvosa, and what secrets does he know that could justify the bounties for his death? This volume of Pathfinder presents an in-depth exploration of the rakshasas of the world of Golarion and reveals details on one of the world's most sinister networks of assassins, the Red Mantis.