On a cool June morning, Isa Wilde, a resident of the seemingly idyllic coastal village of Salten, is walking her dog along a tidal estuary. Before she can stop him, Isa's dog charges into the water to retrieve what first appears to be a wayward stick - and to her horror, Isa discovers it's not a stick at all...but a human bone. As her three best friends from childhood converge in Salten to comfort a seriously shaken-up Isa, terrifying discoveries are made, and their collective history slowly unravels.

Everyone who lives at 23 Beulah Grove has a secret. If they didn't, they wouldn't be renting rooms in a dodgy old building for cash - no credit check, no lease. It's the kind of place you end up when you you've run out of other options.The six residents mostly keep to themselves, but one unbearably hot summer night, a terrible accident pushes them into an uneasy alliance. What they don't know is that one of them is a killer. He's already chosen his next victim, and he'll do anything to protect his secret.

Barrie Anne Blythe and her aunt Charlotte have always known that the other residents of their small coastal community find them peculiar - two women living alone on the outskirts of town. It is the price of concealing their strange and dangerous family secret. But two events threaten to upend their lives forever. The first is the arrival of a mysterious abandoned baby with a hint of power like their own. The second is the sudden reappearance of Barrie Anne's long-lost husband - who is not quite the man she thought she married.

When Martha’s beloved father dies, he leaves her two things: a mysterious stash of letters to an English woman named "Catkins" and directions to a beach hut in the English seaside town of Wells-Next-the-Sea. Martha is at a painful crossroads in her own life and seizes this chance for a trip to England - to discover more about her family’s past and the identity of her father’s secret correspondent.

Headstrong journalist Anna Rothman knows what suicide looks like - her own husband killed himself five years ago. When Elly Swift, an agitated passenger beside her on a train, leaves a locket in Anna's bag before jumping onto the tracks, Anna starts asking questions. But everything points to suicide and the police close the case. However, Anna believes that Elly's fears for Toby, her young nephew who was snatched from St. Stephen's church six months ago, fail to explain the true reason behind Elly's distress.

The perfect daughter. The perfect girlfriend. The perfect murder? Jenna is seriously ill. She's lost all hope of getting the heart transplant she needs to live. But just as her life is ebbing away, she receives a donor heart from a girl called Callie. Who was Callie and how did she die? Jenna is determined to find out.

Librarian Martha Storm has always found it easier to connect with books than people—though not for lack of trying. She keeps careful lists of how to help others in her superhero-themed notebook. And yet, sometimes it feels like she’s invisible. All of that changes when a book of fairy tales arrives on her doorstep. Inside, Martha finds a dedication written by her best friend—her grandmother Zelda—who died under mysterious circumstances years ago. When Martha discovers a clue within the book that her grandmother may still be alive, she becomes determined to discover the truth.

Mary has been nursing a secret. Forty years ago, she made a choice that would change her world for ever, and alter the path of someone she holds dear. Beth is searching for answers. She has never known the truth about her parentage, but finding out could be the lifeline her sick child so desperately needs. When Beth finds a faded newspaper cutting amongst her mother's things, she realises the key to her son's future lies in her own past. She must go back to where it all began to unlock...the Secret.

As young widow Rehana Haque awakes one March morning, she might be forgiven for feeling happy. Today she will throw a party for her son and daughter. In the garden of the house she has built, her roses are blooming, her children are almost grown, and beyond their doorstep, the city is buzzing with excitement after recent elections. Change is in the air.

In the quiet village of Noon Sun, Benedict Stone has settled into a complacent and predictable routine. Business at his jewelry shop has dried up; his marriage is on the rocks. His life is in desperate need of a jump-start. And then a surprise arrives at his door. Gemma is Benedict's audacious teenage niece—the daughter of his estranged brother, Charlie. The two Stone brothers had a falling out and haven't spoken in almost two decades, since Charlie left for America. Reckless and stubborn, Gemma invites herself into Benedict's world and turns his orderly life upside down.

Gretta Riordan wakes on a stultifying July morning to find that her husband of forty years has gone to get the paper and vanished, cleaning out his bank account along the way. Gretta’s three grown children converge on their parents’ home for the first time in years.

Time stops for Jen when her beloved daughter, Gracie, is involved in a terrible car crash. Pronounced dead at the scene, it's a miracle when paramedics manage to then resuscitate the little girl. The relief Jen feels at Gracie's recovery is matched only by her fury at the driver of the car - her ex-husband's new girlfriend, Ella. Jen has never trusted Ella, and now her worst fears have been confirmed.

Lexie Sinclair yearns for more than her parents’ genteel country life. She makes her way to the city, where she meets a magazine editor, Innes, a man unlike any she has ever imagined. He introduces her to the thrilling world of Bohemian postwar London, and Lexie learns to become a reporter, to know art and artists, to live fully, unconventionally, and with deep love. And when she finds herself pregnant by a man wholly unsuitable for marriage or fatherhood, she doesn’t hesitate a minute to have the baby on her own.

When a Navy vessel comes across a yacht in distress in the middle of the vast Indian Ocean, Captain Danial Tengku orders his ship to rush to its aid. On board the yacht is a British couple: a horribly injured man, Jake, and his traumatized wife, Virginie, who breathlessly confesses, “It’s all my fault. I killed them.” Trembling with fear, she reveals their shocking story to Danial.

A tragic family event reveals devastating news that rips apart Bella's comfortable existence. Embarking on a personal journey to uncover the truth, she faces a series of traumatic discoveries that take her to the ruggedly beautiful Cornish coast, where hidden truths, past betrayals and a 25-year-old mystery threaten not just her identity but her life.