From the back of the book:
When the Scourge was imminent, the people of the town of Ardanyan sought shelter in an underground kaer, expecting only the Horrors to be a threat. During the centuries of confinement, small quarrels grew into conflicts, which in turn developed into blood feuds and racial hatred. The Horrors would gladly have fed on Kaer Ardanyan - if they had only found it...
For generations, a secret society betrayed the unsuspecting citizens of Kaer Ardanyan. Now it struggles to keep its terrible secret. The player characters are the spark igniting a bonfire of intrigue, deceit and illusion. But the heroes have to be careful not to fall victim to the flames while on their dangerous quest to save the residents of a lost kaer!
Ardanyan's Revenge is an adventure supplement for Earthdawn Third Edition. Intended for Initiate and Novice characters of any Discipline, this book provides comprehensive information on starting and Earthdawn game for kaer-dwelling characters, but integrates easily into any running Earthdawn Campaign