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.

When Milla accepts an off-season invitation to Le Rocher, a cozy ski resort in the French Alps, she's expecting an intimate weekend of catching up with four old friends. It might have been a decade since she saw them last, but she's never forgotten the bond they forged on this very mountain during a winter spent fiercely training for an elite snowboarding competition. Yet no sooner do Milla and the others arrive for the reunion than they realize something is horribly wrong.

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.

Beth has always known there was something strange about her daughter, Hannah. The lack of emotion, the disturbing behavior, the apparent delight in hurting others.... Luke comes from the perfect family, with the perfect parents. But one day, he disappears without a trace, and his girlfriend, Clara, is desperate to discover what has happened to him. As Clara digs into the past, she realizes no family is truly perfect and uncovers a link between Luke's long-lost sister and a strange girl named Hannah. Now Luke's life is in danger because of the lies once told and the secrets once kept.

Nina Landry awakens on her 40th birthday, anticipating a day filled with excitement. She, her new boyfriend, and her two children are taking a trip - leaving their home on Sandling Island, off the coast of England, for a dream vacation. As soon as her 15-year-old daughter, Charlie, returns from a sleepover, they can get ready to leave. But Charlie doesn’t come home at the expected time. As minutes and then hours tick by, Nina’s annoyance soon changes to concern, and then to a chilling certainty that something terrible has happened.