Someone has to die.... Henning Juul sits in a boat on a dark lake. A man with a gun sits opposite him. At the man's feet is a body that will be soon be dumped into the water. Henning knows that the same fate awaits him. And he knows that it's his own fault. Who started the fire that killed Henning's young son? How is his sister, Trine, involved? Most importantly, who can be trusted?

Investigator Sofia Kovic has uncovered a connection between several deaths in Oslo over the last year and a half. She tries to call her superior, Alexander Blix, but before Blix has time to return her call, Kovic is shot and killed in her own home. In the apartment below, Blix’s daughter Iselin narrowly escapes becoming the killer’s next victim. Four days later, Blix and online crime journalist Emma Ramm are locked inside an interrogation room, facing the National Criminal Investigation Service. 

Oslo, New Year’s Eve. The annual firework celebration is rocked by an explosion, and the city is put on terrorist alert. Police officer Alexander Blix and blogger Emma Ramm are on the scene, and when a severely injured survivor is pulled from the icy harbour, she is identified as the mother of two-year-old Patricia Smeplass, who was kidnapped on her way home from kindergarten 10 years earlier and never found. Blix and Ramm join forces to investigate the unsolved case.

Oslo, 2018. Former long-distance runner Sonja Nordstrøm never shows at the launch of her controversial autobiography, Always Number One. When celebrity blogger Emma Ramm visits Nordstrøm’s home later that day, she finds the door unlocked and signs of a struggle inside. A bib with the number one has been pinned to the TV. Police officer Alexander Blix is appointed to head up the missing-persons investigation, but he still bears the emotional scars of a hostage situation 19 years earlier, when he killed the father of a five-year-old girl.

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.

Erica Wright lives a quiet, lonely life in her two-bed end of terrace. Her front door hasn't been graffitied in more than a year, but that's soon about to change - her son, Craig, is being released from prison. Local journalist Luke Harding is determined to warn the public. As the person who covered the arrest and trial all those years ago, he knows the kind of predator Craig really is. When Luke's worst fears are realised after a woman is attacked days after Craig's release, he becomes obsessed with trying to prove that Craig was behind it. Erica is worried, too - but how can a mother turn her back on her son? And how far will she go to protect him?

Two men have been murdered. Both of them were school bullies when they were younger. Plenty of people would have wanted them dead. A single clue has been found at the scene: a class photo from 1982, with two faces neatly crossed out. Fabian Risk is the lead detective on the case. He's also one of the children in the photograph. As more people die and more faces are crossed out, it becomes clear that a serial killer is targeting old classmates one by one. Fabian Risk thought he'd left his schooldays behind.... Now he must confront his past.

After a messy divorce, attractive young mother Sonia is struggling to provide for herself and keep custody of her son. With her back to the wall, she resorts to smuggling cocaine into Iceland and finds herself caught up in a ruthless criminal world. As she desperately looks for a way out of trouble, she must pit her wits against her nemesis, Bragi, a customs officer whose years of experience frustrate her new and evermore daring strategies.

In 1999, 17-year-old Tone Vaterland was killed on her way home from work. Desperate for a conviction the police deemed the investigation an open-and-shut case and sent her spurned boyfriend, Danny Momrak, down for murder. But 20 years later William Wisting receives a puzzling letter. It suggests the wrong man was convicted for Tone's death and that the real murderer is still out there and could kill again.

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.... 

When single mother Maríanna disappears from her home, leaving an apologetic note on the kitchen table, everyone assumes that she's taken her own life...until her body is found in the Grábrók lava fields seven months later, clearly the victim of murder. Her neglected 15-year-old daughter, Hekla, has been placed in foster care, but is her perfect new life hiding something sinister?

Lee, southeast London. A young girl has disappeared. There are no witnesses, no leads, no clues. The police are tracking a shadow, and time is running out.... DI Ellen Kelly is at the top of her game - at least she was, until she took the law into her own hands and confronted her husband's killer. Now she's back at work, leading the investigation into the missing child. Her superiors are watching her; the distraught family is depending on her. Ellen has a lot to prove. And she knows it.

Women are rarely cold-blooded killers. But when famous philanthropist Hugo Fletcher is found dead, there is no doubt in anybody's mind that the killer is a woman. And it is clear from the precision of the planning that this was no crime of passion. It was an execution. The victim was revered the world over for his charitable work with trafficked Eastern European prostitutes, and as at least one of these girls is missing, Detective Chief Inspector Tom Douglas is certain that there has to be a connection.

Social media stars Chloe Morrison and Joe Hooper seem to have it all - until their bodies are found following an anonymous phone call to their high-profile agent. They are tied and bound to chairs facing each other, and their violent deaths cause a media scrum to descend on Liverpool, with DI David Murphy and DS Laura Rossi assigned to the case. It quickly becomes clear that the killer believes secrets and lies within relationships should have deadly consequences....

As DI Nicola Tanner investigates what appears to be a series of organised killings, her partner, Susan, is brutally murdered, leaving the detective bereft - and vengeful. Taken off the case, Tanner enlists the help of DI Tom Thorne to pursue a pair of ruthless killers and the broker handing out the deadly contracts. As the killers target their latest victim, Thorne takes the biggest risk of his career and is drawn into a horrifying and disturbing world in which families will do anything to protect their honour.