A One-Round Living Greyhawk Gran March Regional Adventure
From the introduction:
Madness has been sweeping Gran March. Otherwise peaceful citizens are attacking their neighbors for no reason. Can you discover the cause before it is too late?
A Gran March Regional adventure for [character levels] 2 - 8.
Part Seven of the Homefront series.
This adventure is also related, though not directly a part of, the Outsiders In series.