Creative writer. I need a 40 minute Halloween murder mystery story with 8 characters in the story.

This is for a virtual event. I need a murder mystery story, scripted for 8 characters. Must be Halloween-based because all characters will be wearing costumes. The story will take place in a restaurant setting, or a mansion with a very large restaurant-type hosting room. The decor will be spooky/scary Halloween props. It will be a dinner, 2 of the characters will be serving food and drinks, one character will be a narrator.