In the previous session the constables of the Royal Homeland Constabulary attempted to search the manor of Mayor Reed Macbannin. But an earthquake prompted a fight in which they managed to arrest the mayor. This session started with the mayor agreeing to help them, in order to prevent an industrial catastrophe. He told them that he had a hidden basement in the Shadowfell parallel plane, in which he was creating and storing large amounts of witchoil. The earthquake damage might cause this witchoil to spill down Cauldron Hill into the Nettles quarter and cause countless deaths.

He led the constables to the garden shed, where they found a woman apparently half sunk into the stone floor, dead. She was holding iron amulets, which the mayor told them were necessary to see and use the entrance to the basement. Putting on an amulet, Merian saw that the woman had in fact come up a staircase when she succumbed to her injuries, and that there was an elevator further on. Taking the staircase the group descended into the basement.

The mayor explained that the whole complex was powered by an engine which ran on witchoil, but apparently the earthquake had shut down that engine. The danger was that another device, magical in nature, tapped the Shadowfell energy for an endless stream of witchoil. Normally a pump emptied the reservoir and pumped the content further into the mountain (the mayor refused to say what for), but it wouldn't run without the engine powering it. So the reservoir could run over and spill witchoil, which caused damage on contact, down the mountain.

The group advanced towards the engine, but in the engine room they were attacked by Creed, the killer with whom they had had several encounters. Prompted by the constables the mayor tried to get Creed to give up, but to no avail. A fight ensued with Creed, two rogues from Lorcan Kell's thieves guild, and three flayed jaguars.

Unlike the first fight against the jaguars, this time the group remembered the option to try a strength check to rip off their chest plate and expose the witchoil-powered heart. With some lucky rolls all three of the jaguars died very quickly. The rogues and Creed took longer to kill, and Creed did some serious damage, but in the end the group prevailed. At that point we ended the session, leaving the final cleanup of the adventure for next year.