From the publisher's website:
When Pathfinders in and around the Osirian capital of Sothis don’t respond to an emergency summons to the Sothis Lodge, you are sent to discover their whereabouts. What you discover are a series of horrific murders all tied to a long-forgotten curse from the Society’s past.
A Pathfinder Society Scenario designed for 7th to 11th level characters (Tiers: 7-8 and 10-11).
This scenario is designed for play in Pathfinder Society Organized Play, but can easily be adapted for use with any world. This scenario is compliant with the Open Game License (OGL) and is suitable for use with the Pathfinder Roleplaying Game.