From the front page of the PDF:
Part Two Of The Howling Hills Saga
A One-Round D&D LIVING GREYHAWK® Meta-Regional Adventure
It has been five years since Count Sverdlin took Kendragund Keep from the Urzun Orcs. Since that time, a flourishing city has developed around the keep, and it has become a seat of power and corruption in the Land Of Iuz. But there are deep shadows hanging over Kendragund. Count Sverdlin and his brother Sven have become increasingly reclusive, and the Urzun have been asked to oversee a new kind of merchandise, destined to make this dread city live forever in the favor of Old Wicked. This scenario follows on from IUZ3-07 Infiltration, and is designed for APLs 4-12.