Pathfinder Adventure Path: Mummy's Mask Part 5 - The Slave Trenches of Hakotep

The Sky Pharaoh Hakotep I has risen and launched an attack against the city of Wati with his infamous flying pyramid. The heroes return to Wati to defend the city against this menace, only to discover that the attack is just the preface to a larger invasion of Osirion, controlled from Hakotep's own flying tomb.