After another family is killed, the custody officer admits that Salter terrified him into releasing him. Salter was owed money by the victims, as he was by his brother, and he is eventually cornered in a cinema and recaptured. However he is exonerated following the slaughter of another household, the link to each slaying being that in each case a selfish young woman is spared. Buchan's research leads to a man who was familiar with the murder sites and had a grievance against an arrogant female driver. Have the police got their man this time?