I'll kill that horse, Lady Foley said, quite loudly. But it was another horse that died. Not her son Lionel's Shoestring but the very valuable Silver Monarch. And the killer didn't hesitate to murder a man who got in the way. So Superintendant West was faced with a particularly difficult case. Why had Silver Monarch been so senseless slaughtered? Had the killer made a mistake? and, above all, who was the killer?