From the front page of the PDF:
A One-Round D&D LIVING GREYHAWK®
Iuz’s Border States Meta-regional Adventure
A late night of celebration turns into an early morning of planar travel. Join the power brokers as useful pawns or equal peers are you negotiate the secrets of the Old One’s plans. An adventure for APLs 10 to 16, Part 5 in the Purification Cycle.