Pete Riley answers the door one morning and lets in a parent's worst nightmare. On his doorstep is Miles Lambert, a stranger who breaks the devastating news that Pete's son, Theo, isn't actually his son - he is the Lamberts', switched at birth by an understaffed hospital while their real son was sent home with Miles and his wife, Lucy. For Pete, his partner Maddie, and the little boy they've been raising for the past two years, life will never be the same again.

Abbie awakens in a daze with no memory of who she is or how she landed in this unsettling condition. The man by her side claims to be her husband. He’s a titan of the tech world, the founder of one of Silicon Valley’s most innovative start-ups. He tells Abbie that she is the perfect wife. He says she had a terrible accident five years ago and that, through a huge technological breakthrough, she has been brought back from the abyss. But as Abbie pieces together memories of her marriage, she begins to question her husband’s motives - and his version of events.

Driving home one night, stuck behind a rusty old car, Gabe sees a little girl’s face appear in its rear window. She mouths one word: Daddy. It’s his five-year-old daughter, Izzy. He never sees her again. Three years later, Gabe spends his days and nights traveling up and down the highway, searching for the car that took his daughter, refusing to give up hope, even though most people believe she’s dead. When the car that he saw escape with his little girl is found abandoned with a body inside, Gabe must confront not just the day Izzy disappeared but painful events from his past.

Foster sisters Krystal and Nichole have always been there for each other, so when Nichole is committed to a psychiatric hospital after trying to kill her husband, Krystal drops everything to defend her. Scarred by a hard upbringing, Nichole and Krystal managed to construct comfortable lives for themselves. Krystal became a respected lawyer, and Nichole was happily married to an architect - until Nichole starts raving that her husband isn’t her husband, believing that he’s an imposter.

Paul’s just here to help, or so he claims—sent by a charity for vulnerable people to do odd jobs for elderly widow Gwen. But for Gwen’s daughter Connie, there’s just something about Paul that rings alarm bells from day one. He’s a little too kind, a little too involved…Worse still, Gwen seems to have fallen under his spell.

Immi thinks she has found the perfect new home in central London: a shared warehouse with luxury accommodation, a rooftop terrace, and daily yoga, all with a surprisingly affordable price tag. The Dye Factory is a co-living community, designed to combat the loneliness of big city life. But soon after she moves into her new haven, Immi realizes that it's not quite as idyllic as it appears. No one seems to know who is behind this multi-million-pound urban experiment. And her housemates may be hiding a dangerous secret.

Lex Gracie doesn't want to think about her family. She doesn't want to think about growing up in her parents' House of Horrors. And she doesn't want to think about her identity as Girl A: the girl who escaped, the eldest sister who freed her older brother and four younger siblings. It's been easy enough to avoid her parents - her father never made it out of the House of Horrors he created, and her mother spent the rest of her life behind bars. But when her mother dies in prison and leaves Lex and her siblings the family home, she can't run from her past any longer.

Emma is the one that got away. The only survivor of a serial killer known in the tabloids as “The Hairdresser”, because of the trophies he takes from his victims. The police aren't convinced. Nor is her husband. She never actually saw her tormentor properly, but now she recognizes him in every man she sees. Haunted by the horrifying incident and unwanted notoriety, Emma gives up her job as a psychiatrist and retreats from the outside world to recuperate at home, where it’s quiet. Where she can be anonymous and safe. Where no one can hurt her.

Sadie and Will Foust have only just moved their family from bustling Chicago to small-town Maine when their neighbor Morgan Baines is found dead in her home. The murder rocks their tiny coastal island, but no one is more shaken than Sadie. But it’s not just Morgan’s death that has Sadie on edge. And as the eyes of suspicion turn toward the new family in town, Sadie is drawn deeper into the mystery of what really happened that dark and deadly night.

Suzi did a bad thing. She’s paying for it now, pregnant, scared, and living in an isolated cottage with her jealous husband, Nick. When Nora moves into the only house nearby, Suzi is delighted to have a friend. So much so that she’s almost tempted to tell Nora her terrible secret. But there’s more to Nora than meets the eye. It’s impossible - does she already know what Suzi did?

Nina can never forgive Maggie for what she did. And she can never let her leave. They say every house has its secrets, and the house that Maggie and Nina have shared for so long is no different. Except that these secrets are not buried in the past. Every other night, Maggie and Nina have dinner together. When they are finished, Nina helps Maggie back to her room in the attic, and into the heavy chain that keeps her there.

Grace Holloway keeps to herself. Since narrowly escaping death at the hands of the man who kidnapped her, she’s thrown herself into the small inn she runs in Rock Harbor, Maine. It’s quiet, quaint and, in the off-season, completely isolated—the perfect place for Grace to keep her own secrets. But Grace isn’t the only one with something to hide, and Rock Harbor isn’t just a sleepy vacation town. Someone is taking young women—girls who look an awful lot like Grace did when she was kidnapped so many years ago.

A serial rapist is kidnapping teenage girls. But he’s not interested in just any teenage girls - only virgins. He hunts them by following their status updates and check-ins on social media. Once captured, they’re locked away in his sound-proof basement until they’re groomed and ready. He throws them away like pieces of trash after he’s stolen their innocence. Nobody escapes alive. Until Ella. She risks it all to escape, setting herself and the other girls free. Only the girl who's been captive the longest gets out with her. And soon Ella discovers her nightmare's far from over.

When Mel receives an unexpected email from her oldest friend Abi, it brings back memories she thought she had buried forever. Their friendship belonged in the past. To those carefree days at university. But Abi is in trouble and needs Mel’s help, and she wants a place to stay. Just for a few days, while she sorts things out. It’s the least Mel can do. After all, friends look out for each other, don’t they?

Brecken Hill in upstate New York is an expensive place to live. You have to be rich to have a house there, and Fred and Sheila Merton certainly are rich. But even all their money can't protect them when a killer comes to call. The Mertons are brutally murdered after a fraught Easter dinner with their three adult kids. Who, of course, are devastated.