A One-Round Living Greyhawk Gran March Regional Adventure
From the introduction:
You are visiting a small village in Barony of Cavintus. You arrive just in time for the local festival of Bathilda. During the reenactment of the bravery of Bathilda, the person pretending to be the Paynim Chieftain is supposedly smothered. Unfortunately someone seems to have gotten carried away, and now someone will have to investigate a murder. Guess who's going to get stuck with the job?