A group of friends excitedly gather at Sittaford House to participate in a seance. But what was supposed to be a harmless psychic parlor game takes a sinister turn when the death of Captain Trevelyan is predicted and he is subsequently found murdered several hours later. Who, they ask, would want to kill a man who doesn't have an enemy in the world? Only Miss Emily Trefusis can provide the answer by delving far deeper into the spirit world than she would prefer to expose a very human murderer.