Stunning Belrive Priory, consisting of a mansion, park and medieval ruins, is surrounded by the noise and neon signs of its gaudy neighbours: a cotton-mill, a brewey and a main road. Nevertheless, Arthur Ferryman is pleased to return for a family Christmas, but is shocked to discover that his cousins have taken up a new pastime; pistol-shooting. Inspector Appleby arrives on the scene when one of Ferryman's cousins is found shot dead in the study, in a mystery built on family antagonisms.