'Jesus Christ. I found one.' These words are blurted over the phone to Constable Snowy Lane, who is preoccupied with no more than a ham sandwich and getting a game with the East Fremantle league side on Saturday. They signal the beginning of a series of events that are to shake Perth to its foundations. It is 1979, and Perth is jumping with pub bands and overnight millionaires. 'Mr Gruesome' has just taken another victim. Snowy's life and career are to be forever changed by the grim deeds of a serial killer and the dark bloom spreading across the City of Light.

When Sassi Stapleton receives a middle-of-the-night phone call to tell her that her beloved grandmother is unwell, she quickly puts her job on hold, packs her ute and sets off on the long drive home, knowing her grandfather will need her. Less than an hour away from Sassi's hometown, Barker, she swerves to miss a roo and her car rolls down an embankment. By the time Sassi is found, her grandmother has already passed away.

A fire, a missing man and his dog send Dave and his partner Bob Holden south of Perth, to investigate. Leo Perry has been missing for two days when they realize he's probably not dead. In fact he's more likely to have left his life in exchange for a new one. But why? They find CCTV footage showing them that Leo is alive, only two days earlier, but then disaster strikes. A phone call from the Meekatharra Police station changes everything that Dave and Bob already know about the case.

Summer on the Peninsula. The heat’s ramping up, the usual holiday madness building. D.I. Hal Challis is already recycling his shower water and starting to dread Christmas. But this year there’s something more. Women abducted and murdered on the Old Highway. A pall of fear over the scorched paddocks. The media are demanding answers - and Challis’s sleepy beat is set to explode.

In Unamurra, a drought-scarred, one-pub town deep in the outback, two men are savagely murdered a month apart - their bodies elaborately arranged like angels. With no witnesses, no obvious motives and no apparent connections between the killings, how can lone police officer Detective Dana Russo - flown in from hundreds of kilometres away - possibly solve such a baffling, brutal case? Met with silence and suspicion from locals who live by their own set of rules, Dana must take over a stalled investigation with only a week to make progress.