This is a free adventure package for the one shot originally published here: https://goblincoach.com/the-harvest-carnival/ - with permission of the author
An Adventure for 3rd-Level Characters
The party arrives at the final night of the Addlersfield harvest carnival. Expecting an evening of relaxation and revelry, the characters spend time enjoying food, games, and other activities within the carnival. After an hour or two, a large crowd grows around the center stage to watch a magic show put on by the carnival ringmaster. He brings a crowd participant on stage only to kill her in a ritual sacrifice, beginning a night of revenge.