Sixth in the long-running mystery series with Dr Launcelot Priestley

At the brooding, isolated house of Samuel Barton on Tollard Ridge, the owner of the house is found murdered. The obvious culprit appears to be his wayward son Arthur, and the local police have no difficulty in presenting a case against him and bringing him to trial. Meanwhile Samuel Barton's ward and heiress Kitty plans to use the money to break free of her uninspiring marriage with a local farmer and live a little. A second suspicious death leads to the arrival of the celebrated criminologist Dr. Priestley, who soon unearths an elaborate plot of murder.