At thirty-five, Freddie Croft has retired as a steeplechase jockey and now runs a fleet of motor horseboxes transporting runners from their stables to the races, or brood mares to the stud farms. One of the hard and fast rules for all his drivers is never to pick up a hitchhiker, but of course one day they do, and by the time they reach base the passenger is dead. This unwelcome corpse on h...