Adelaide Hills, Christmas Eve, 1959. At the end of a scorching hot day, a local deliveryman makes a terrible discovery. A police investigation is called, and the small town of Tambilla becomes embroiled in one of the most shocking and perplexing murder cases in the history of South Australia. Many years later and thousands of miles away, Jess is a journalist in search of a story. Having lived and worked in London for nearly two decades, she now finds herself laid off from her full-time job and struggling to make ends meet. Until a phone call out of nowhere summons her back to Sydney.

When a teen falls while taking a selfie at the edge of a cliff, the last thing she sees before plummeting to her death is Katie Harmon, the nine-year-old girl she was babysitting, looking down at her. Investigators gather at the scene, and Katie’s mother, Sara, rushes to comfort her daughter. Yet there’s a small, secret ping of alarm in Sara’s heart that she cannot share—though rookie detective Kim Pierce senses it. For years, others have tried to unravel this secret. Now, Sara is consumed by her darkest fear—that the babysitter’s death was not an accident.

Nobel Prize-winning scientist Sarah Collier has taken a step back from work to spend more time with her family. Movie nights with her husband Daniel and their daughter Maddie are a welcome respite from the scrutiny of the world’s press. As much as it hurts, it’s good to be able to see her father more too. He’s suffering from Alzheimer’s and needs special care. Sarah has started to show tell-tale signs of the disease too. She’s been experiencing blackouts and memory loss. It’s early days but she must face the possibility that she won’t be there to see her daughter grow up.

The story opens with the apparently accidental drowning of a sixth form student in the Norfolk countryside. As a matter of routine, or so it seems, the case passes across the desk of Detective Sergeant Smith, recently returned to work after an internal investigation into another case that has led to tensions between officers at Kings Lake police headquarters. As an ex-DCI, Smith could have retired by now, and it is clear that some of his superiors wish that he would do so.

Nora Kelly, a young archaeologist in Santa Fe, receives a letter written 16 years ago, yet mysteriously mailed only recently. In it her father, long believed dead, hints at a fantastic discovery that will make him famous and rich - the lost city of an ancient civilization that suddenly vanished a thousand years ago. Now Nora is leading an expedition into a harsh, remote corner of Utah's canyon country, but what she unearths will be the newest of horrors.

Carol is a divorced teacher living in a small town in Ireland, her only son now grown. A second chance at love brings her unexpected connection and belonging—and sparks a flurry of speculation. What does a woman like her see in a man like that? What happened to his wife who abandoned him and his children all those years ago? Carol and Declan know their relationship is the talk of the town, but the gossip only serves to bring the couple closer.

D.I. Duncan McAdam is dispatched home to the Misty Isle. A body has been found buried in a remote location on the Waternish peninsula. Well-preserved in the peat, Isla Matheson—missing for the better part of two decades—is revealed to a shocked island community. A teenage runaway is dead...and no one is talking.

Detective Chief Inspector Harry Grimm is forced to take leave from Bristol’s Major Investigations Team when his boss, tired of Harry chasing the ghost of his murderous father, sends him north on secondment. Used to city life and high stress, Harry fears his life will now be spent handing out speeding tickets, finding lost sheep, and directing tourists. But when a local teenager runs away, Harry finds himself pulled into an investigation much worse than anyone could have ever expected.

Sarah Jennings knows there’s one place she can go to find some peace and quiet during her difficult divorce. But arriving at her beloved father’s home in the countryside, she finds him unwell and hunched over boxes of files, studying the records from Cedar Hall, the crumbling orphanage in town. He says that hidden behind the wrought iron gates and overgrown ivy are secrets about their family, and he asks for her help.

On Christmas Eve, DCI Mackenzie Jones is called to a shooting at a remote farmhouse. Ralph Mallender believes his father lies dead inside. When three more bodies are discovered, it's clear a festive family gathering has turned into a gruesome tragedy. At first it seems like an open and shut case: a murder suicide committed by Ralph's volatile brother Cameron. Then new evidence makes Mack suspect the man who reported the crime is in fact the perpetrator. But Mack isn't the only one with a stake in the case.

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.

Haunted by an unmet promise, the Swart family loses touch after the death of their matriarch. Adrift, the lives of the three siblings move separately through the uncharted waters of South Africa; Anton, the golden boy who bitterly resents his life’s unfulfilled potential; Astrid, whose beauty is her power; and the youngest, Amor, whose life is shaped by a nebulous feeling of guilt.

Umiko Wada has had enough excitement in life. With an overbearing mother and her husband recently murdered, she just wants to keep her head down. As a secretary to a private detective, her life is pleasantly filled with coffee runs and paperwork. That is, until her boss takes on a new case. A case that is surrounded by shadows. A case that means Wada will have to leave Tokyo and travel to London.

Erin Coleridge's used bookstore in Kirkbymoorside, North Yorkshire, England, is a meeting place for the villagers and, in particular, for the local Jane Austen Society. At the Society's monthly meeting, matters come to a head between the old guard and its young turks. After the meeting breaks for tea, persuasion gives way to murder with extreme prejudice when president Sylvia Pemberthy falls dead to the floor. Poisoned? Presumably, but by whom? And was Sylvia the only target?

Detective Finnegan Beck is called to a crime scene - a remote house near the rural Irish town of Cross Beg - where a dog lies whimpering beside his beloved owner’s body. At first it looks like a burglary gone wrong. But Beck spots something his colleagues didn’t. The victim, Eddie Kavanagh, was wearing his smartest clothes. He’d brushed his hair. And, on closer inspection, a small velvet box containing an engagement ring is discovered in his pocket, along with a letter to a nameless woman, which seems to suggest she’s in danger.