Sami Kierce, a young college grad backpacking in Spain with friends, wakes up one morning, covered in blood. There’s a knife in his hand. Beside him, the body of his girlfriend. Anna. Dead. He doesn’t know what happened. His screams drown out his thoughts—and then he runs. Twenty-two years later, Kierce, now a private investigator, is a new father who’s working off his debts by doing low level surveillance jobs and teaching wannabe sleuths at a night school in New York City. One evening, he recognizes a familiar face at the back of the classroom. Anna.

Author Grady Green is having the worst best day of his life. Grady calls his wife to share some exciting news as she is driving home. He hears Abby slam on the brakes, get out of the car, then nothing. When he eventually finds her car by the cliff edge the headlights are on, the driver door is open, her phone is still there. . . but his wife has disappeared. A year later, Grady is still overcome with grief and desperate to know what happened to Abby. He can’t sleep, and he can’t write, so he travels to a tiny Scottish island to try to get his life back on track. Then he sees the impossible.

In a split second, Morgan Kincaid’s life changes forever. She’s on her way home from work when a mother begs her to take her baby, then places the infant in her arms. Before Morgan can stop her, the distraught mother jumps in front of an oncoming train. Morgan has never seen this woman before, and she can’t understand what would cause a person to give away her child and take her own life. She also can’t understand how this woman knew her name.

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.

Following a traumatic event in London, Kirsty Woodhouse packs up her family and moves back to her native Wales. There she sets up her new home with her husband and two young daughters, and goes into business with her difficult mother managing a guesthouse in the Brecon Beacons. But when the guesthouse is ready to be occupied, Kirsty encounters the last person she ever expected to see: her estranged cousin Selena. It has been seventeen years since they last talked—when Selena tore everything apart between them. Why has she chosen now to walk back into Kirsty's life?

Lucy and her husband, Adam, have been best friends with another couple, Cora and Scott, for years. The four are practically family—they vacation together, co-own a beach cottage, and their children are inseparable. So Lucy is devastated when, while looking at a colleague’s photos of a trip to the Maldives, she spots a picture of Scott, apparently on vacation with another woman.

Flight attendant Allegra Patel loves her job, but today is her twenty-eighth birthday and she’d rather not be placating a plane full of passengers unhappy about a long delay. There’s the well-dressed man in seat 4C desperate not to miss his daughter’s musical. A harried mother frantically tries to keep her toddler and baby quiet. Honeymooners still in their wedding finery dream of their new lives, while a chatty emergency room nurse dreams of retirement.

He is her husband. She is his captive. Her husband calls her Jane. That is not her name. She lives in a small farm cottage, surrounded by vast, open fields. Everywhere she looks, there is space. But she is trapped. No one knows she is there. Visitors rarely come to the farm; if they do, she is never seen.

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.

Childhood sweethearts Nicole and Tom are a normal, loving couple—until a massive lottery win changes their lives overnight. Soon they’ve moved into a custom-built state-of-the-art Glass Barn on the stunning grounds of Lancaut Manor in Gloucestershire. They have fancy cars, expensive hobbies, and an exclusive lifestyle they never could have imagined. But this dream world quickly turns into a nightmare when Tom is found dead in the swimming pool. Was Tom’s death a tragic accident, or was it something worse?