Harriet Walker is a cop. She has it all, a loving husband and a promising career as a detective. But things go awry when her husband Matt, an undercover federal agent, is murdered. Within 24 hours, she has gone from detective to prime suspect and sets about burying her grief in her own private investigation. The painful search for details of her husband's death also leads to her confronting evidence of his infidelity. Together with new partner Joe, she must find her husband's lover to get to the truth behind the murder.

Harriet Walker is a cop. She has it all, a loving husband and a promising career as a detective. But things go awry when her husband Matt, an undercover federal agent, is murdered. Within 24 hours, she has gone from detective to prime suspect and sets about burying her grief in her own private investigation. The painful search for details of her husband's death also leads to her confronting evidence of his infidelity. Together with new partner Joe, she must find her husband's lover to get to the truth behind the murder.

After being arrested on peeping tom charges, Joe's informant Louis “The Fly” gives detectives a tip on the location of a body. The dead man, a local jeweller, was involved in an illegal immigrant smuggling operation but when the detective's locate his murderer, they discover that he is under the protection of the Federal Police who will go to any length to keep their man safe from the clutches of the local cops.

Theo goes undercover to infiltrate a drug smuggling operation involving lawyer Ray Jarvis [ep 1.03]. The difficult job turns life threatening when his cover is blown forcing him to rely on a woman he has become involved with to keep him alive. Nicole struggles to pull the trigger during a training exercise.

The body of a young Asian girl is found in a garbage compactor, leading the Kingsway detectives to an international illegal prostitution racket.

The lives of two of Kingsway's finest detectives are in grave danger when Joe and Harriet are the targets of a terrifying car bomb attack outside the police station. While Harriet survives the blast, two uniformed policemen are seriously wounded. And things are about to get much worse for the crime-fighting duo as they continue their investigatation into the sex slave racket. Joe is devastated when an anonymous complaint is made against him, hinting at sexual misconduct with his daughters.