The Malchort Cabal

From publisher blurb:

After the PCs new patron mysteriously disappears, the PCs are drawn into the dark dealings of powerful cabal of nobles whose secret interests in the Sink they would kill to protect. Yet even within their inner circle, cabal members keep secrets from each other, forcing the PCs to scramble for answers to stop an unknown madman from stirring whatever horrors he believes lie within the lightless depths of the massive sinkhole.

The Malchort Cabal is designed using the Pathfinder RPG System for 4th–level Player Characters. This is a double-sized episode which marks the end of the first season.