From the publisher's website:
The Shadow Lodge’s assault on the Pathfinder Society has come to a head in the Andoren city of Almas, where renegade Shadow Pathfinders have taken over the Grand Cathedral of Aroden, holding the Pathfinders and Venture-Captain stationed there hostage. You must gain entry into the overrun Pathfinder lodge and put an end to the open warfare within the Society.
A Pathfinder Society Scenario designed for 1st to 7th level characters (Tiers: 1-2, 3-4 and 6-7).
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.