It all began with sheep-stealing. A hateful act among the shepherds of the fells, and yet not a matter of life and death. Then came arson and with the leaping of the flames, death and disorder reached the peaceful moors. Holidaying with his friends the Hoggetts in High Gimmerdale while on a trip to find some farmland for his retirement, Robert Macdonald agrees to help in investigating the identity of the sheep-stealers, before being dragged into a case requiring his full experience as Chief Inspector of Scotland Yard.