An elderly man is found dead in his home. His body is bound to a chair, his home has been ransacked, and a mysterious hole has been dug in his backyard. The Kingsway detectives are called in. Further complicating matters is a mysterious phone call placed from the man's home to the Kingsway station on the day the incident occurred. Joe believes the call was from a careless police officer phoning in the crime, but the call appears in Nicole's phone log having been dismissed as just one of a series of prank calls made to the station in recent days. It's a puzzling case with few suspects and no apparent motive, the detectives have their work cut out for them. Nicole reaches her limit with Joe. His inability to appreciate the guilt she feels at possibly playing a role in the man's death (as a result of not acting on the phone call) sparks her decision to move out of Joe's house. A controversial court decision by Harriet's mother affects Harriet's relationship with Sophie.

A suspicious death on an Army base brings out Harriet and Joe to investigate. The death would appear to be a suicide but Joe is not sure, suspecting the military of closing ranks to protect one of their own.

Over the years, Detective Sergeant Joe Hill has had the highly dubious Nick Karados in his sights many times. But Nick has always managed to stay just out of Joe's reach. Could that be about to change? Nick, who now appears to be involved in a stolen luxury-car racket, is about to meet Joe's colleague, Detective Senior Constable Harriet Walker. Working undercover, Harriet pretends to be in the market for a top-end vehicle. Will Nick fall for her charms or will her dangerous game soon be up?

The death of a fruiterer seems the result of a war between two organised crime gangs. Or is it just personal? Could Harriet be suffering from a case of the green-eyed monster? She certainly seems anything but chuffed when rookie constable Nicole Brown moves in on the close professional bond Harriet has formed with Joe Hill. Nicole was once involved in a steamy relationship with Joe. Now Harriet can't help feeling that her professional territory is being invaded.

When Nicole is called to the horrific murder of a young woman in a remote industrial area, she's forced to examine the way she views crime and criminals. Forensic tests reveal Diane Swift was raped, tortured, and set on fire with petrol. The horror of the murder leads Nicole into a relationship with the woman's best friend as she strives to understand the reasons behind the killing. Nicole's empathy deepens when she's asked to imitate Diane for a re-enactment of her last known movements in an attempt to generate badly needed leads.

Three elderly women are brutally murdered in their homes forcing the Kingsway detectives to determine if the crimes are the work of a serial killer or merely coincidence. Nicole calls on Sophie's estranged mother to help care for Eliot. Theo's test results come back.