From the front page of the PDF:
A One-Round Dungeons & Dragons® Living Greyhawk
Iuz’s Border States Metaregional Adventure
Hired to track a suspicious person, you travel to Stalmaer in Furyondy and cross the River into the Gnarley Forest, into the lands of Verbobonc. What or, more importantly, who will you find there? A one-round Iuz metaregional adventure set in Furyondy & Verbobonc for APLs 8-14.
Resources for this adventure include The Marklands and Book of Vile Darkness.