Bullying snob Alistair Kingslake is killed with a golf iron at the Whiteacres golf club. After another member, Miles Tully, tells Barnaby about illegal gambling among players, another member, who has had an 'odd phone call' is also slain. A figure in a blue tracksuit is seen at both murders. In fact there have been unreported assaults on members over the months. Barnaby discovers that the gambling is rife and the social-climbing steward , Mrs. Fountain, and her two warring sons are lending money to the gamblers and assaulting them if they fail to pay. Indeed Mrs. Fountain's scheming has driven the killer to commit the Dogleg Murders.“也是我送给你义父和你顾氏家族的一份大礼。”楚阳轻笑道：“你来做家主，可要比他们两个强多了。起码顾氏家族的前途，能保障顾妙龄，能早点出来……”