In a Stockholm city park, police discover the hideously abused body of a young boy. Detective Superintendent Jeanette Kihlberg heads the investigation, battling an apathetic prosecutor and a bureaucratic police force unwilling to devote resources to solving the murder of a nameless immigrant child. But with the discovery of two more mutilated children's corpses, it becomes clear that a serial killer is at large.

NYPD detective Jacob Kanon is on a tour of Europe's most gorgeous cities. But the sights aren't what draw him - he sees each museum, each cathedral, and each cafe through the eyes of his daughter's killer. Kanon's daughter, Kimmy, and her boyfriend were murdered while on vacation in Rome. Since then, young couples in Paris, Copenhagen, Frankfurt, and Stockholm have been found dead. Little connects the murders other than a postcard to the local newspaper that precedes each new victim.

Iceland, 1956. Fourteen-year-old Lára decides to spend the summer working for a couple on the small island of Videy, just off the coast of Reykjavík. In early August, the girl disappears without a trace. Time passes, and the mystery becomes Iceland‘s most infamous unsolved case. What happened to the young girl? Is she still alive? Did she leave the island, or did something happen to her there? Thirty years later, as the city of Reykjavík celebrates its 200th anniversary, journalist Valur Robertsson begins his own investigation into Lára's case.

On the day Stockholm police officer Hanna Ahlander’s personal and professional lives crash, she takes refuge at her sister’s lodge in the Swedish ski resort paradise of Åre. But it’s a brief comfort. The entire village is shaken by the sudden vanishing of a local teenage girl. Hanna can’t help but investigate, and while searching for the missing person, she lands a job with the local police department. There she joins forces with Detective Inspector Daniel Lindskog, who has been tasked with finding the girl. Their only lead: a scarf in the snow.

Rebecka Martinsson is heading home to Kiruna, the town she'd left in disgrace years before. A Stockholm attorney, Rebecka has a good reason to return: her friend, Sanna, whose brother has been horrifically murdered in the revivalist church his charisma helped create. Beautiful and fragile, Sanna needs someone like Rebecka to remove the shadow of guilt that is engulfing her, to forestall an ambitious prosecutor and a dogged policewoman.

Icelandic sisters Áróra and Ísafold live in different countries and aren‘t on speaking terms, but when their mother loses contact with Ísafold, Áróra reluctantly returns to Iceland to find her sister. But she soon realises that her sister isn’t avoiding her...she has disappeared. As she confronts Ísafold’s abusive, drug-dealing boyfriend Björn, and begins to probe her sister’s reclusive neighbours, Áróra is led into an ever-darker web of intrigue and manipulation.

When a body of a woman is discovered at a lighthouse in the Icelandic town of Akranes, it soon becomes clear that she’s no stranger to the area. Chief Investigating Officer Elma, who has returned to Akranes following a failed relationship, and her collegues Sævar and Hörður commence an uneasy investigation which uncovers a shocking secret in the dead woman’s past that continues to reverberate in the present day.

It’s been more than 20 years since Olof Hagström left home. Returning to his family’s house, he knows instantly that something is amiss. The front door key, hidden under a familiar stone, is still there. Inside, there’s a panicked dog, a terrible stench, water pooling on the floor: The father Olaf has not seen or spoken to in decades is dead in the bathroom shower.

A judge’s first murder trial. A defense attorney in over his head. A prosecutor out for blood and glory. The accused, who is possibly innocent. And the killer, who may have just committed the perfect crime.

Burned out and traumatised by her horrifying experiences around the world, aid worker Úrsula has returned to Iceland. Unable to settle, she accepts a high-profile government role. But on her first day in the post, Úrsula promises to help a mother seeking justice for her daughter, who had been raped by a policeman. A homeless man is stalking her – but is he hounding her, or warning her of some danger? And why has the death of her father in police custody so many years earlier reared its head again?

Nora's daughter, Annabelle, has disappeared, last seen on her way home from a party. Gullspång's inexperienced police are wilting under the national media spotlight - and its residents desperate for answers. Stockholm DI Charlie Lager must return home to find Annabelle and then get out of town as soon as she can. Before everyone discovers the truth about her....

When a young boy discovers the body of a woman beneath a thick sheet of ice in a South London park, Detective Erika Foster is called in to lead the murder investigation. The victim, a beautiful young socialite, appeared to have the perfect life. Yet when Erika begins to dig deeper, she starts to connect the dots between the murder and the killings of three prostitutes, all found strangled, hands bound, and dumped in water around London.

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.

When a woman's body is discovered in a cathedral and hours later a young man is found hanging from a tree outside his home, Detective Lottie Parker is called in to lead the investigation. Both bodies have the same distinctive tattoo clumsily inscribed on their legs. It's clear the pair are connected, but how? The trail leads Lottie to St Angela's, a former children's home, with a dark connection to her own family history. Suddenly the case just got personal.

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.