Dementia 13

John Haloran has a fatal heart attack, but his wife Louise won't get any of the inheritance when Lady Haloran dies if John is dead. Louise goes to his Irish ancestral home, Castle Haloran, to meet the family and look for a way to ensure a cut of the loot. Seven years earlier John's sister Kathleen was drowned in the pond, and the Halorans enact a morbid ritual in remembrance.