Just a brief six months ago Mac had been the head of a London Murder Squad and a policeman renowned for his skill in solving the most difficult cases. Now a private detective and, after bereavement and pain, he doubts himself and is no longer sure if he has the will or the energy to make a success of his new career. His first case comes by chance as a mother's grief sends him into a town's red light district to find out how her daughter died. Mac soon finds himself working with a team of local police detectives who are hot on the trail of a cold-blooded serial killer. Mac has to dig deep and rediscover all his talents in order to solve the case of The Body in the Boot.