On the brink of divorce from his wife Joanna, selfish slob Simon Fisher reluctantly agrees to attend a Halloween supper with his snobby next door neighbours, Phil and Pam. When Simon and Joanna arrive they meet the fifth guest, a mysterious old man. The stranger is in fact a demon, intent on imprisoning them in the house until midnight. Then he will decide which one of them to possess for the next one hundred years. Best get to know your neighbours - you might need them some day.