D&D Halloween Mystery One-shot

This will be a one session (one and done) Halloween themed D&D style adventure/mystery. I will have pre-generated characters to choose from. This is very beginner friendly. You don't have to know anything about Roleplaying games or learn any rules.

What follows is a short intro:
After travelling far and wide, having adventures together and with the harvest approaching, your party has decided to take a well-earned rest in the farming town you see approaching on the horizon. Will the fates and gods allow a respite, or will you be yet again tasked by circumstance and the looming evil in the land?

NOTE: As many people can come, watch, jeer, cheer or make suggestions of what the players should do, but I have to limit the number of actual players to 4