From publisher blurb:
Travel to a Distant Outpost
Durgams Folly sits at the edge of the kingdom, an embattled outpost against the evil creatures of the wild. You travel with a caravan to that distant fortress, transporting mysterious cargo. But as you approach your destination, something is amiss. A local hamlet is in ruins. Strange creatures patrol the land. Has the famed fortress finally been overthrown?
Battle an Unexpected Foe
The Siege of Durgams Folly includes maps of the fortress of Durgams Folly and the chambers beneath. It details a strange new set of monsters that will plague your campaign for years to come. Can your learn the dark secrets of the remote fortress? And in the end, will your party discover who or what is truly behind the siege of Durgams Folly? A fantasy adventure for 4 to 6 characters of 5th to 8th level.