Detective Dave Burrows has longed for the top job in the Stock Squad but never thought he'd be acting in that role while his partner and best mate, Detective Bob Holden, is treated for melanoma. Bob is keen to get back on the road and Dave can't wait to go bush either, expecting the trip will be much the same as usual. But the trip doesn't play out that way. Multiple bomb blasts in the small country town of Kallygarn send shock waves through the state of WA, and Dave and Bob are once again drawn into the underworld of crime.

During a broiling heatwave, the inner circle of a high-profile charity attend a critical meeting at White Ash Ridge, a small hotel nestled in the Australian wilderness. As the temperature rises, a body is found lying in the thick bush, bludgeoned to death. One of the four remaining guests is a murderer - but who, and why, is a mystery. Detective Dana Russo knows the national spotlight will be sharply focused on the case. The charity was formed when the founders' teenage son was killed after intervening in a vicious assault - sparking public outrage and a damning verdict on the investigation.

1987: It's late summer and a time of change when a 17-year-old girl leaves the local shopping center in the sleepy town of Lowbridge and is never seen again. Her unsolved disappearance is never far from the town's memory. There's those who grew up in the shadow of her loss whose own lives were altered forever, and those who know more than they're saying. It just takes an outsider to ask the right questions.

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.

Detective Rebecca Giles has just finished interviewing aging petty crim Sticky Pete over a spate of break-and-enters when a disturbing new report comes in. Twelve-year-old Kayleen Ellis has vanished from her home in Muswellbrook in the Upper Hunter Valley. Hours later, Giles is a local hero, having apparently solved Kayleen's case and the spate of jewellery thefts. Yet the hangover from her celebrations has barely kicked in when the body of young jillaroo Ava Emmerson is discovered in gruesome circumstances on a nearby farm.

Anna and Matt Butler were childhood sweethearts with a dream of owning their own land, a dream they achieved through hard work and determination. But as the seasons conspire against them and Matt is involved in a terrible accident, the couple face financial ruin and the loss of their farm. As they fight for everything they hold dear, they suddenly find themselves caught up in events much bigger and more dangerous than they could ever have imagined.

'Did you have to kill them all?' It's the question Gabe Ahern has been running from since he bust open a major criminal operation - and left a dozen men dead. He knows that one day the 'bad guys' will come for revenge. A skilled dog-trapper, Gabe has one rule: leave no sign, leave no trace. And for the last year he's been successfully hiding out on a friend's remote cattle property in the Pilbara.

Meg Morrissey has just lost her job and her partner to an overseas assignment, when she is called back to the family home of Hunters Reach in the picturesque Adelaide Hills. Her ailing grandmother, who raised her when she was orphaned as a child, has always been a formidable figure in her life and this is hardly a welcome summons. When Meg arrives at the ramshackle old homestead, she learns that the place is up for sale. She is expected to care for the property with its extensive garden, while packing up the contents of the house.

Since inheriting Nambina, the property that's been in her family for generations, Laura Murphy has worked wonders. Rather than just focus on farming she has set up a successful school teaching women the basics of managing a property—from fencing and mustering to handling the financial side of the business. But the notoriously self-reliant Laura is lonely and still scarred by a tragedy from her past. She's also grappling with the hostility of her nearest neighbor and former best friend, Meghan Hunter. The fact that Laura's ex-boyfriend Josh is Meghan's brother only makes things worse.

Helicopter pilot Ellie Porter loves her job. Soaring above the Kakadu National Park, she feels freed from the questions around her father’s suicide and the heavy loss of her beloved family farm. But when a search-and-rescue mission on the boundary of the old farm reveals unusual excavation works, Ellie vows to investigate. 

When marketing executive Tessa Mathison leaves London to attend her great-aunt's funeral in Australia, her life is in turmoil. An indiscretion during a boozy night out has resulted in Tessa's name being mud in London's cliquey marketing scene, and soon after she arrives in her homeland she discovers she's been sacked. Tessa's childhood home, Danjar Plains, is an isolated station which holds some bad memories for her. She plans to escape it as soon as the funeral is over, but then an unusual request in her Aunt Violet's will makes it impossible for her to leave.

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.

Nash Rankin is a disgraced cop trying to escape his past—his career was destroyed when he chose to take justice into his own hands. Now he's living a quiet life in a small town caring for the local wildlife and trying to stay away from trouble. Jesse Redpath has a new job in a new town, Satellite—the stormy weather that greets her first few days on the new beat seems like a sign for what's to come. A local has died in what seems like an accident, but Jessie isn't so sure that ‘accident' wasn't planned. All evidence seems to point to Nash, but Jesse's not sure about that either.

DS Lucas Walker is on leave in his hometown, Caloodie, looking after his dying grandmother. When two young German backpackers vanish from the area on their way to a ranch, he finds himself unofficially on the case. But why all the interest from the Federal Police, when they have probably just ditched the heat and dust of the outback for the coast? As the number of days the couple are missing climbs, DS Walker is joined by the girl's sister. A detective herself from Berlin, she is desperate to find her before it's too late.

When Orla Macrae receives a letter asking her to return to the family cattle property where she grew up, she does so grudgingly. Her estranged uncle, Palmer, may be dying, but he is the last person she wants to see, especially since she's made a new life far away from where she lost so much. But on his deathbed he utters a few enigmatic words about a secret locked away and a clue as to its whereabouts.