In the desolate outback town of Finnigans Gap, police struggle to maintain law and order. Thieves pillage opal mines, religious fanatics recruit vulnerable youngsters and billionaires do as they please. Then an opal miner is found crucified and left to rot down his mine. Nothing about the miner's death is straight-forward, not even who found the body. Homicide Detective Ivan Lucic is sent to investigate, assisted by inexperienced young investigator Nell Buchanan.

Constable Paul Hirschhausen runs a one-cop station in the dry farming country south of the Flinders Ranges. He's still new in town but his community work - welfare checks and a light touch - is starting to pay off. Now Christmas is here and, apart from a grass fire, two boys stealing a vehicle and Brenda Flann entering the front bar of the pub without exiting her car, Hirsch's life has been peaceful. Until he's called to an incident on Kitchener Street, a strange and vicious attack that sickens the community.

Winter in Tiverton, and Constable Paul Hirschhausen has a snowdropper on his patch. Someone is stealing women's underwear, and Hirsch knows how that kind of crime can escalate. Then two calls come in: a child abandoned in a caravan, filthy and starving. And a man on the rampage at the primary school. Hirsch knows how things like that can escalate, too. An absent father who isn't where he's supposed to be; another who flees to the back country armed with a rifle. Families under pressure can break. But it's always a surprise when the killing starts.

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.

Kieran Elliott's life changed forever on a single day when a reckless mistake led to devastating consequences. The guilt that haunts him still resurfaces during a visit with his young family to the small coastal town he once called home. Kieran's parents are struggling in a community which is bound, for better or worse, to the sea that is both a lifeline and a threat. Between them all is his absent brother, Finn. When a body is discovered on the beach, long-held secrets threaten to emerge in the murder investigation that follows.

Is Alice here? Did she make it? Is she safe? In the chaos, in the night, it was impossible to say which of the four had asked after Alice's welfare. Later, when everything got worse, each would insist it had been them. Five women reluctantly pick up their backpacks and start walking along the muddy track. Only four come out the other side.

Detective Eira Sjödin is just old enough to remember the summer when 16-year-old Lina Stavred went missing. Her entire community was haunted by the disappearance - especially when Olof Hagström, just 14 himself, confessed to her murder. That was two decades ago. No one in their small rural community has seen or heard from him since, but the spectre of his crime lingers in the forests around the town. But now Olof is back, and he stands accused of another brutal crime.

When the police are called to the report of a late-night shooting, they expect it to be drugs or gang-related. They don’t expect to find a young student executed on his way home. Jordan Radley was an aspiring journalist: hard working, well-liked, dedicated. His first major story - looking at the fallout following the closure of a major local factory - had run recently and looked to be the first step in his longed-for career. Even after the story ran, Jordan continued to stay in contact with those he interviewed: he was on his way back from their social club the night he was murdered.

'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.

Detective Inspector Karen Eiken Hornby has returned to the main island, Heimö, after many years in London and has worked hard to become one of the few female police officers in Doggerland. So, when she wakes up in a hotel room next to her boss, Jounas Smeed, she knows she's made a big mistake. But things are about to get worse: later that day, Jounas's ex-wife is found brutally murdered. And Karen is the only one who can give him an alibi.

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.... 

Ryan Wilkins grew up on a trailer park, a member of what many people would call the criminal classes. As a young Detective Inspector, he's lost none of his disgust with privileged elites - or his objectionable manners. But he notices things; they stick to his eyes. His professional partner, DI Ray Wilkins, of affluent Nigerian London heritage, is an impeccably groomed, smooth-talking graduate of Balliol College, Oxford. You wouldn't think they would get on. They don't. But when a young woman is found strangled at Barnabas Hall, they're forced to. 

Profoundly deaf since early childhood, Caleb has always lived on the outside - watching and picking up tell-tale signs people hide in a smile, a cough or a kiss. When a childhood friend is murdered, a sense of guilt and a determination to prove his own innocence sends Caleb on a hunt for the killer. But he can’t do it alone....

Broken by his last case, homicide detective Joe Cashin has fled the city and returned to his hometown to run its one-man police station while his wounds heal and the nightmares fade. He lives a quiet life with his two dogs in the tumbledown wreck his family home has become. It's a peaceful existence - ideal for the rehabilitating man. But his recovery is rudely interrupted by a brutal attack on Charles Bourgoyne, a prominent member of the local community.

When three-year-old Harry goes missing, the whole of America turns its attention to one small town. Everyone is eager to help. Everyone is a suspect. Desperate mother Jess' grief is driving her to extreme measures. Newcomer Jared, with an easy charm and a string of broken hearts in his wake is also a suspect. Photographer Jerry is a suspect who is determined to break away from his controlling mother once and for all. And investigating them all is a police chief with a hidden obsession of his own....