Norfolk, 1643. With civil war tearing England apart, reluctant soldier Thomas Treadwater is summoned home by his sister, who accuses a new servant of improper conduct with their widowed father. By the time Thomas returns home, his father is insensible, felled by a stroke, and their new servant is in prison, facing charges of witchcraft. 

Paris, 1750. In the midst of winter, as birds fall frozen from the sky, a new maid arrives at the home of a celebrated clockmaker and his clever, unworldly daughter. But rumours are stirring that Reinhart's uncanny mechanical creations - bejewelled birds, silver spiders - are more than mere automata. That they might defy the laws of nature, perhaps even at the expense of the living. But Madeleine is hiding a dark past, and a dangerous purpose - to discover the truth of the clockmaker's experiments and record his every move, in exchange for her own chance of freedom.

It's 1645. When Alice Hopkins' husband dies in a tragic accident, she returns to the small Essex town of Manningtree, where her brother Matthew still lives. But home is no longer a place of safety. Matthew has changed, and there are rumours spreading through the town: whispers of witchcraft, and of a great book, in which he is gathering women's names. To what lengths will Matthew's obsession drive him? And what choice will Alice make when she finds herself at the very heart of his plan?

In the golden city of Amsterdam, in 1705, Thea Brandt is turning eighteen, and she is ready to welcome adulthood with open arms. At the city’s theatre, Walter, the love of her life, awaits her, but at home in the house on the Herengracht, all is not well—her father Otto and Aunt Nella argue endlessly, and the Brandt family are selling their furniture in order to eat. On Thea’s birthday, also the day that her mother Marin died, the secrets from the past begin to overwhelm the present.

Isabel Frith, the village midwife, walks a dangerous line with her herbs and remedies. There are men in the village who speak of witchcraft, and Isabel has a past to hide. So she tells nobody her fears about Wulfric, the pious, reclusive apothecary. Mae, Wulfric's youngest daughter, dreads her father's rage if he discovers what she keeps from him. Like her feelings for Rafe, Isabel's ward, or that she studies from Wulfric's forbidden books at night. But others have secrets too. Secrets darker than any of them could have imagined.

In London 1799, Dora Blake is an aspiring jewellery artist who lives with her uncle in what used to be her parents' famed shop of antiquities. When a mysterious Greek vase is delivered, Dora is intrigued by her uncle's suspicious behaviour and enlists the help of Edward Lawrence, a young man seeking acceptance into the Society of Antiquaries. Edward sees the ancient vase as key to unlocking his academic future. Dora sees it as her chance to restore her parents' shop to its former glory and to escape her uncle.

Strasbourg, 1518. In the midst of a blisteringly hot summer, a lone woman begins to dance in the city square. She dances for days without pause or rest, and as she is joined by hundreds of others, the authorities declare an emergency. Musicians will be brought in to play the Devil out of these women. Just beyond the city’s limits, Lisbet lives with her mother-in-law and husband, tending the bees that are their livelihood. And then, as the dancing plague gathers momentum, Lisbet’s sister-in-law returns from seven years’ penance in the mountains for a crime no one will name.

1768. Charlotte, daughter of the Habsburg empress, arrives in Naples to marry a man she has never met. Her sister, Antoine, is sent to France, and in the mirrored corridors of Versailles, they rename her Marie Antoinette. The sisters are alone, but they are not powerless. When they were only children, they discovered a book of spells—spells that work, with dark and unpredictable consequences. In a time of vicious court politics, of discovery and dizzying change, they use the book to take control of their lives.

Alone in the world, Elspeth Swansome has taken the position of nanny to a family on the remote Scottish island of Skelthsea. Her charge, Mary, is a strange child. Distracted and secretive, she hasn't uttered a word since the sudden death of her twin, William - just days after their former nanny disappeared. With her charge defiantly silent, Elspeth turns to the islanders. But no one will speak of what happened to William.

Abandoned at the gates of a London park one winter's night in 1850, baby Lily Mortimer is saved by a young police constable and taken to the London Foundling Hospital. Lily is fostered by an affectionate farming family in rural Suffolk, enjoying a brief childhood idyll before she is returned to the hospital, where she is punished for her rebellious spirit. Released into the harsh world of Victorian London, Lily becomes a favoured employee at Belle Prettywood's Wig Emporium, but all the while she is hiding a dreadful secret.

Amelia Prentice is recovering from the worst two years of her life. First her daughter and then her parents have died, leaving her without any surviving relatives. As she gets ready to put the family home, a vast Victorian house in Windsor, on the market, she fulfils her mother’s last request to clear out the attic, and she discovers a strange box of Victorian photographs. 

1620s Lancashire. Away from the village lies a small hamlet, abandoned since the Plague, where only one family dwells amongst its ruins. Young Sarah Haworth, her mother, brother and little sister, Annie, are a family of outcasts by day and the recipients of visitors by night. They are cunning folk: the villagers will always need them, quick with a healing balm or more, should the need arise. They can keep secrets, too, because no one would believe them anyway.

October 1840. A young woman staggers alone through a forest in Shropshire as a huge pair of impossible wings rip themselves from her shoulders. Meanwhile, when rumours of a 'fallen angel' cause a frenzy across London, a surgeon desperate for fame and fortune finds himself in the grips of a dangerous obsession, one that will place the women he seeks in the most terrible danger.

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....

Forty years ago, Steven Smith found a copy of a famous children's book by disgraced author Edith Twyford, its margins full of strange markings and annotations. Wanting to know more, he took it to his English teacher Miss Iles, not realising the chain of events that he was setting in motion. Miss Iles became convinced that the book was the key to solving a puzzle and that a message in secret code ran through all Twyford's novels. Then Miss Iles disappeared on a class field trip, and Steven has no memory of what happened to her.