On a sultry summer night in 1994, Nathaniel and Katherine Gye are guests at a Civil War fancy-dress party. The theme of the occasion is apt because Tripletree, the Jacobean manor house in the heart of the Cotswolds where the event is being held, is steeped in history and enjoys a colorful past. But at the end of a glittering evening tragedy strikes, and the body of a woman is dragged from the lake. This is merely the first of a catalog of misadventure that befalls the introverted rural community, dominated by a legacy of witchcraft and feuds. As he tries to unravel the truth, Nathaniel Gye, a parapsychic investigator, finds himself drawn back to the 17th century and the time when the hill above Tripletree manor was the place where the gallows once stood.