From the front page of the PDF:
A One-Round D&D Living Greyhawk®
Iuz Border States Metaregional Adventure
The famous explorer Uust Van Ingermann has disappeared, and associates of his need the services of seasoned adventurers to locate his so called “Great Northern Expedition”. Van Ingermann and his companions were last heard of in the lands of the Wolf Nomads. What on Oerth could he be looking for there? A mostly outdoors adventure not to be missed for APLs 6 to 12. Part 1 of the Legacy of Serpents.