Following the break-up of his home life, criminal psychologist Fitz discovers that a young woman he knew has been viciously murdered.

Elsewhere, a blood-splattered man is found beside the railway tracks but on recovering consciousness, he claims memory loss.

Criminal psychologist Fitz is frustrated when another murdered woman is found and he is ordered off the case.

Despite this initial setback, Fitz and DS Penhaligan are determined to find out the truth.

Problems between criminal psychologist Fitz and his wife Judith continue after Fitz is arrested outside his in-laws' house and taken to the station.

There he meets Sean and his partner Tina, car thieves who embark upon a spree of violence.

Whilst on their spree of violence, Tina and Sean murder a police officer.

Criminal psychologist Fitz turns down DS Penhaligon's offer of a bed for the night, but is then approached by Tina who asks him to accompany her to her flat.