1940: In south-west Ireland, the young and beautiful Lady Charlotte Rathmore is pronounced dead after she disappears by the lake of Blackwater Hall. In London, on the brink of the Blitz, Nancy Rathmore is grieving Charlotte's death when a letter arrives containing a secret that she is sworn to keep. 2019: Ellie Fitzgerald is forced to leave Dublin disgraced and heartbroken. Abandoning journalism, she returns to rural Kerry to weather out the storm. But, when she discovers a faded letter, tucked inside the pages of an old book, she finds herself drawn in by a long-buried secret.

Eleanor Blackwood discovers a woman's body in the same spot in the woods where her mother was strangled eighteen years previously. But before the police can get there, the body vanishes. Is Eleanor's disturbed mind playing tricks on her again, or has her mother's killer resurfaced? And what does the number on the dead woman's forehead signify?

1939: On the eve of war, young English heiress Grace Grey travels from London to the wilderness of Tasmania. Coaxed out of her shell by the attentions of her Irish neighbour, Daniel - Grace finally learns to live. 1975: Artist Willow Hawkins, and her new husband, Ben, can't believe their luck when an anonymous benefactor leaves them a house on the remote Tasmanian coast. 2004: Libby Andrews has always been sheltered from the truth behind her father Ben's death.

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.

1933. Hannah Snow is fleeing her unhappy marriage to an MP when she finds herself in a small hotel on the banks of Loch Ness. But when a monster is spotted in the depths of the waters, the press descends – and Hannah finds her hiding place is discovered. Someone has been looking for Hannah, and when they find her events will take a devastating turn. Present day. True crime podcaster Scarlett finds herself intrigued by the mystery of Hannah Snow, wife of a promising government minister who disappeared in 1933 – just months before her husband also went missing, presumed dead.

On the eve of a world war, a forbidden love will blossom in the garden of a stately home, where one young woman will make a choice that will change her life forever. As the storm clouds of war gather, Cordelia seeks refuge in the grounds of her family estate. Handsome landscaper Isaac has recently arrived to tend to the gardens, and the connection between him and Cordelia is as immediate as it is forbidden. Isaac begins to secretly teach her how to cultivate the gardens, so when he and all the young men are called away to war, Cordelia takes over.

1889: Kitty Gray dreams of attending university and becoming a doctor, but when she is married off to Charles Maclean, one of Glasgow's richest and most eligible bachelors, her aspiration suddenly slips far from reach. Exiled to her new remote home in the Scottish Highlands, with its gargoyles, gothic arches and turrets, Kitty seeks solace in creating a restorative herb garden. Combining her medical knowledge and new-found fascination with herbalism, Kitty spends her days absorbed in a world of herbs and their healing properties until a devastating tragedy strikes...

Amber Alton knows that the hours pass differently at Black Rabbit Hall, her London family's country estate, where no two clocks read the same. Summers there are perfect, timeless. Not much ever happens. Until, of course, it does. More than three decades later, Lorna is determined to be married within the grand, ivy-covered walls of Pencraw Hall, known as Black Rabbit Hall among the locals.

In 1903, fishermen find a wrecked boat containing a woman, who has been badly beaten, and a young girl. In 1993, All Hallows is now a boarding school. Following his mother’s death and his father’s hasty remarriage, Lewis Tyler is banished to Dartmoor, stripped of his fashionable clothes, shorn of his long hair and left feeling more alone than ever. There he meets Isak, another lost soul, and whilst refurbishment of the dormitories is taking place, the boys are marooned up in the attic, in an old wing of the school.

Germany, 1945. As the ground shakes and the air raid sirens wail, Katja holds her tiny baby to her chest. She pictures Karl’s handsome face and kind blue eyes, her breath catching at the thought of him heading back to the front. She must never tell anyone about the letters she delivered for him or the other secret she is hiding....

Present day. Fresh from her divorce, Millie Galton moves into a former inn overlooking the harbour in Mudeford and plans to create her dream home. When a chance discovery behind an old fireplace reveals the house’s secret history as a haven for smugglers and the devastating story of its former residents, could the mystery of a disappearance from centuries ago finally be solved?

England, 1959: Laurel Nicolson is 16 years old, dreaming alone in her childhood tree house during a family celebration at their home, Green Acres Farm. She spies a stranger coming up the long road to the farm and then observes her mother, Dorothy, speaking to him. And then she witnesses a crime.

Edie Burchill and her mother have never been close, but when a long lost letter arrives one Sunday afternoon with the return address of Milderhurst Castle, Kent, printed on its envelope, Edie begins to suspect that her mother’s emotional distance masks an old secret.

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.

Hannah Brown thought she had put the past behind her. But now it's coming to find her.... Hannah never dreamed she'd have a best friend like Ellen Brecht. Ellen is everything Hannah wants to be - beautiful, daring, glamorous and powerful. Growing up together in windswept Cornwall, life seems perfect. But their idyllic childhood is shattered by obsession, betrayal and, ultimately, a terrible tragedy.