Mariana Andros is a brilliant but troubled group therapist who becomes fixated on The Maidens when one member, a friend of Mariana’s niece Zoe, is found murdered in Cambridge. Mariana, who was once herself a student at the university, quickly suspects that behind the idyllic beauty of the spires and turrets, and beneath the ancient traditions, lies something sinister. And she becomes convinced that, despite his alibi, Edward Fosca is guilty of the murder. But why would the professor target one of his students?

Celebrating her forty-fifth birthday at her local pub, popular podcaster Alix Summer crosses paths with an unassuming woman called Josie Fair. Josie, it turns out, is also celebrating her forty-fifth birthday. They are, in fact, birthday twins. A few days later, Alix and Josie bump into each other again, this time outside Alix’s children’s school. Josie has been listening to Alix’s podcasts and thinks she might be an interesting subject for her series. She is, she tells Alix, on the cusp of great changes in her life.

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.

High-powered businesswoman Lana Rubicon has a lot to be proud of: her keen intelligence, impeccable taste, and the L.A. real estate empire she’s built. But when she finds herself trapped 300 miles north of the city, convalescing in a sleepy coastal town with her adult daughter Beth and teenage granddaughter Jack, Lana is stuck counting otters instead of square footage—and hoping that boredom won’t kill her before the cancer does.

Leonora, known to some as Lee and others as Nora, is a reclusive crime writer, unwilling to leave her nest of an apartment unless it is absolutely necessary. When a friend she hasn't seen or spoken to in years unexpectedly invites Nora ( Lee) to a weekend away in an eerie glass house deep in the English countryside, she reluctantly agrees to make the trip. Forty-eight hours later, she wakes up in a hospital bed injured but alive, with the knowledge that someone is dead.