Detective Zane Malik is deep undercover and in danger. Can he link an arms dealer, Akmal, with the car bomb murder of an NSO agent? Agent Skerritt is positive there's a connection. When Akmal's girlfriend is killed, he orders a hit on the man who killed her... and he wants Malik to do it.

An ambulance officer is stabbed to death by a kid in an drug-induced rage. Detective Sonny Koa delivers the news and bonds with the victim's family. The mother of the deceased extracts a promise from Koa: she wants her son back, in one piece, for burial. Meanwhile, the mystery surrounding the dead NSO agent deepens.

A trip to Canberra with the widow of the murdered NSO agent leads Malik face-to-face with an old foe. But his absence from Major Crime causes problems as the squad investigates a mysterious crossbow killing. Inspector Wright juggles professional and personal problems, as her own brother is the target of a hitman.