From the front page of the PDF:
A One-Round D&D LIVING GREYHAWK®
Iuz’s Border States Meta-regional Adventure
The PCs are given the opportunity to learn more about the machinations of the Old One from an unusual and dangerous source. The PCs travel into the Empire of Iuz to find the truth about an offer from this strange bedfellow. An adventure for APLs 10 to 16, Part 4 in the Purification Cycle.