Aldis hates her job working in a juvenile detention center in rural Iceland. The boys are difficult, the owners are unpleasant, and there are mysterious noises at night. And then two of the boys go astray.... Decades later single father Odinn is looking into alleged abuse at the center. The more he finds out, though, the more it seems the odd events of the 1970s are linked to the accident that killed his ex-wife. Was her death something more sinister?

The only person who might have the answers to a baffling murder case is the victim's seven-year-old daughter, found hiding in the room where her mother died. And she's not talking. Newly-promoted, out of his depth, detective Huldar turns to Freyja for her expertise with traumatized young people. Freyja, who distrusts the police in general and Huldar in particular, isn't best pleased. But she's determined to keep little Margret safe. It may prove tricky. The killer is leaving them strange clues: warnings in text messages, sums scribbled on bits of paper, numbers on the radio.

They whisper about her in Chicago. Men come to her with their hopes, their dreams - their fortunes. But no one sees them leave. No one sees them at all after they come to call on the Widow of La Porte. The good people of Indiana may have their suspicions, but if those fools knew what she'd given up, what was taken from her, how she'd suffered, surely they'd understand. Belle Gunness learned a long time ago that a woman has to make her own way in this world. 

Cat lives in Los Angeles, far from 36 Westeryk Road, the imposing gothic house in Edinburgh where she and her estranged twin sister, El, grew up. As kids, they invented Mirrorland, a dark, imaginary place under the pantry stairs, full of pirates, witches, and clowns. These days, Cat rarely thinks about their childhood home, or the fact that El now lives there with her husband, Ross. But when El mysteriously disappears after going out on her sailboat, Cat is forced to return to 36 Westeryk Road, which hasn’t changed in twenty years.

Documentary filmmaker Alice Lindstedt has been obsessed with the vanishing residents of the old mining town, dubbed “The Lost Village”, since she was a little girl. In 1959, her grandmother’s entire family disappeared in this mysterious tragedy, and ever since, the unanswered questions surrounding the only two people who were left - a woman stoned to death in the town center and an abandoned newborn - have plagued her. She’s gathered a small crew of friends in the remote village to make a film about what really happened. 

Upstate New York, 1982. Viv Delaney wants to move to New York City, and to help pay for it she takes a job as the night clerk at the Sun Down Motel in Fell, New York. But something isnʼt right at the motel, something haunting and scary. Upstate New York, 2017. Carly Kirk has never been able to let go of the story of her aunt Viv, who mysteriously disappeared from the Sun Down before she was born. She decides to move to Fell and visit the motel, where she quickly learns that nothing has changed since 1982.

The Himalayas, 1935. Kangchenjunga. Third-highest peak on earth. Greatest killer of them all. Five Englishmen set off from Darjeeling, determined to conquer the sacred summit. But courage can only take them so far - and the mountain is not their only foe. As the wind dies, the dread grows. Mountain sickness. The horrors of extreme altitude. A past that will not stay buried. And sometimes, the truth does not set you free.

January 1937. Jack Miller has just about run out of options. His shoes have worn through, he can't afford to heat his rented room in Tooting, and he longs to use his training as an specialist wireless operator instead of working in his dead-end job. When he is given the chance to join an arctic expedition, as communications expert, by a group of elite Oxbridge graduates, he brushes off his apprehensions and convinces himself to join them.

Two years ago, Julia lost her family in a tragic accident. Her husband drowned trying to save their daughter, Lily, in the river near their rural home. But the little girl’s body was never found - and Julia believes Lily is somehow still alive. Alone and broke, Julia opens her house as a writers’ retreat. One of the first guests is Lucas, a horror novelist, who becomes obsessed with finding out what happened to Lily. 

West Hall, Vermont, has always been a town of strange disappearances and old legends. The most mysterious is that of Sara Harrison Shea, who, in 1908, was found dead in the field behind her house just months after the tragic death of her daughter, Gertie. Now, in present day, 19-year-old Ruthie lives in Sara's farmhouse with her mother, Alice, and her younger sister, Fawn. Alice has always insisted that they live off the grid, a decision that suddenly proves perilous when Ruthie wakes up one morning to find that Alice has vanished without a trace. Searching for clues, she is startled to find a copy of Sara Harrison Shea's diary....

An 11-year-old boy's violated corpse is found in a town park. Eyewitnesses and fingerprints point unmistakably to one of Flint City's most popular citizens. He is Terry Maitland, Little League coach, English teacher, husband, and father of two girls. Detective Ralph Anderson, whose son Maitland once coached, orders a quick and very public arrest. Maitland has an alibi, but Anderson and the district attorney soon add DNA evidence to go with the fingerprints and witnesses. Their case seems ironclad.

Una wants nothing more than to teach, but she has been unable to secure steady employment in Reykjavík. Her savings are depleted, her love life is nonexistent, and she cannot face another winter staring at the four walls of her shabby apartment. Celebrating Christmas and ringing in 1986 in the remote fishing hamlet of Skálar seems like a small price to pay for a chance to earn some teaching credentials and get her life back on track.

When Mouse’s dad asks her to clean out her dead grandmother's house, she says yes. After all, how bad could it be? Answer: pretty bad. Grandma was a hoarder, and her house is stuffed with useless rubbish. That would be horrific enough, but there’s more - Mouse stumbles across her step-grandfather’s journal, which at first seems to be filled with nonsensical rants...until Mouse encounters some of the terrifying things he described for herself.

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.

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.