DC Dinah Kowalska discovers a pattern in the deaths of two young women and realises Friday Street Station has a twisted serial killer on its hands.

Deering and her team lose the serial killer to Maclaren's team after Dinah becomes personally involved with the girl who survived the attack. The cops see a chance to redeem themselves when a new street drug has the locals dropping like flies.

Local racial tensions run high when an Asian woman is killed in a suspected racist attack. The team goes undercover to bring in the prime suspect.

The Friday Street team uncover a scam encouraging people in debt to sell their kidneys on the black market, while the search for another girl abducted by the serial killer leads to a vital breakthrough in the case.

The police ready a trap for the prime suspect in the serial killer case, but their plans risk being derailed entirely when a notorious child murderer's new identity is leaked online.

Deering leads a manhunt through Manchester as the net closes in on the serial killer; Joy and Spike discover an unsettling slavery case after a brutal attack on a young homeless man.