Constable Paul Hirschhausen - "Hirsch" - is a recently demoted detective sent from Adelaide, Australia's southernmost booming metropolis, to Tiverton, a one-road town in rustic, backwater "wool and wheat" country three hours north. Hirsch is more than just a disgraced cop, a rumored whistle-blower - internal investigations is still trying to convict him of something, even if it means planting evidence, and someone has a bullet they'd like to put in his head, as has been made clear by the pistol cartridge left in his mailbox.

Wyatt robs banks and payroll vans. Most men like him are dead or in jail, but Wyatt stamps a cold, pitiless style on his heists and has never been caught. Now his funds are low and his luck is running out - until the day Anna Reid explains about the kickback in her partner’s safe. But other players are involved. In Wyatt’s world, there is no yielding, no redemption, and when he’s crossed, the outcome is inevitable.

Detective Sergeant Mark Ariti has taken a few days' holiday in Broken Bay at precisely the wrong time. The small fishing town on South Australia's Limestone Coast is now the scene of a terrible tragedy. Renowned cave-diver Mya Rennik has drowned while exploring a sinkhole on the land of wealthy farmer Frank Doyle. As the press descends, Mark's boss orders him to stay put and assist the police operation. But when they retrieve Mya's body, a whole new mystery is opened up, around the disappearance of a young local woman twenty years before.

Detective Alan Auhl does things his own way - and gets results. He works cold cases now. Like the death of John Elphick - his daughters are still convinced he was murdered, the coroner not so sure. Or the skeleton that’s just been found under a concrete slab. Or the doctor who killed two wives and a girlfriend and left no evidence at all....

In a peaceful retirement village, four unlikely friends meet weekly in the Jigsaw Room to discuss unsolved crimes; together, they call themselves the Thursday Murder Club. When a local developer is found dead with a mysterious photograph left next to the body, the Thursday Murder Club suddenly find themselves in the middle of their first live case.