Two elderly sisters invite their wonderful nieces and nephews to a dinner party in celebration of the sisters' upcoming birthdays. The one nephew who is not invited is the ostracized black sheep of the family whose devil-worshipping activities have resulted in his being removed from the sisters' inheritance. The rest of the guests are merely putting in time; they're really just waiting for their aunts to kick the bucket, leaving them amply endowed via their respective inheritances. But, the nephew sends a party gift that turns the scene into a frolic of the macabre: the aunts turn cannibal and eat up all their guests!