A One-Round Living Greyhawk Gran March Regional Adventure
From the introduction:
Petros Gwalchen has more dire tidings for the Commandant of Gran March. Another plot against the strongest military power in the Sheldomar Valley and its duly appointed leader is about to manifest, and, once again, the Commandant appears to be uninterested or unaware of unfolding events. Politics and surveillance prevent Petros from delivering the message himself, but you are another matter.
A Gran March regional adventure for [characters level] 6 - 12, and Part One of The Outsiders In series.