Six scientists arrive at the creepy Headstone Manor to investigate a strange phenomena which was the site of a mysterious massacre years earlier where 18 guests were killed in one night. It turns out that the house is the place of a satanic cult lead by a minister monk who plans to kill the scientists who are inhabiting this house of Satan.

Middle aged Chris Harper and Annie Clarke are best friends. They spend much of their time at their local Knapely, Yorkshire County chapter of the Women's Institute (WI), whose motto is "enlightenment, fun and friendship". Although they like most of the women at the WI (the friendship part), they, but the perceived flaky Chris in particular, hold the way Marie, the local president, runs the chapter with derision. They find much of what goes on there, especially the monthly presentations, banal...