The pursuit of a stolen car ends tragically when a police officer is killed after an iron bar is thrown from an overpass, smashing through the car's windscreen and piercing the driver's chest. The officer, Albie Borich, is an estranged friend of Theo, who must break the news to Albie's wife, who is pregnant with what Theo believes could be his child. The investigation of the case is difficult for Theo who roughs up Lenny Hunter, a man suspected of being the driver of the stolen car. Police suspect the accident may have been an ambush, targeting the policeman responsible for arresting Lenny's brother, but is all what it seems?

A frantic early morning visit by an old friend of Harriet's may be an omen of an investigation not yet begun when he later comes forward to police to report having been in the company of a woman the night she was killed. The detectives are torn between two suspects. Joe believes Harriet's friend being unable to recall events of the night in question makes him an obvious suspect while Harriet looks at the woman's fiancé as the more likely suspect.