From the front page of the PDF:
A One−Round D&D LIVING GREYHAWK®
Iuz’s Border States Meta−regional Adventure
Hidden away in the recesses of Iuz’s vast empire is a lonely research tower surrounded by a burning landscape. Life and limb must be put on the line to get a glimpse into the Old One’s vile plan. Only those with the bravery and wit to break into a tower owned by a Boneheart need apply. Part three of the Machinations plot line. For characters of levels 5-15 (APLs 6-14).