November. With the tourist season well and truly over in South Devon, Detective Inspector Wesley Peterson is looking forward to a quieter month in the CID. But when a man is shot dead on Bonfire Night, he finds he has a disturbing murder case on his hands.
The body of Patrick North was found in woodland connected to Nesbaraton Hall, a grand estate dating back to the eighteenth century. North worked for the Smithson family who now own the estate. The family are away on holiday, however when an anonymous letter threatening to abduct the Smithson son is uncovered, Wesley fears North's death might have been collateral damage in a kidnap plot.
Meanwhile, archaeologist Dr Neil Watson discovers a hidden grotto on land that was once part of the Nesbaraton estate. Evidence of past rituals and the shocking discovery of a skeleton raise questions about strange occurrences, past and present, on the land.
Then, just when Wesley's team seem to be making progress in their investigation, a resident of the nearby village is killed in a near-identical shooting to North's. A race is on to find the ruthless killer, before they strike again...