It was supposed to be the perfect prom weekend getaway. But it's clear something terrible happened when Claire wakes up alone and bloodied on a hiking trail with no memory of the past 48 hours. Now everyone wants answers - most of all, Claire. She remembers Friday night, but, after that...nothing. And now Kat and Jesse - her best friends - are missing. What happened on the mountain? And where are Kat and Jesse? Claire knows the answers are buried somewhere in her memory. But as she's learning, everyone has secrets - even her best friends.

Shortly after marrying her soulmate and the birth of their son, the lies begin. First, it's the phone calls, always held in secret, always deleted from his phone. Then it's his odd disappearances and the little nagging voice in her head screaming: Something is not right. When Palmer follows her gut - and her husband - she catches him with an unfamiliar woman in the park and in his biggest lie thus far. Learning from her past, she hatches a plan to protect herself and their child.

Whitney had some misgivings when she dropped her increasingly moody teenage daughter, Amelia, off at Lauren’s house. She’d never met the parents, and usually she’d go in, but Amelia clearly wasn’t going to let something so humiliating happen, so instead Whitney waved to her daughter before pulling away from the little house with the roses in front. But when she goes back the next day, an elderly couple answers the door - Amelia and Lauren aren’t there, and this couple swears they never were, that she’s at the wrong house.

Lou is a happily married mother of an adorable toddler. She’s also the victim of a local serial killer. Recently brought back to life and returned to her grieving family by a government project, she is grateful for this second chance. But as the new Lou re-adapts to her old routines, and as she bonds with other female victims, she realizes that disturbing questions remain about what exactly preceded her death and how much she can really trust those around her.

FBI Agent Nell Flynn hasn't been home in 10 years. Nell and her father, Homicide Detective Martin Flynn, have never had much of a relationship. When Martin Flynn dies in a motorcycle accident, Nell returns to the house she grew up in so that she can spread her father's ashes and close his estate. At the behest of her father's partner, Detective Lee Davis, Nell becomes involved in an investigation into the murders of two young women in Suffolk County. The further Nell digs, the more likely it seems to her that her father should be the prime suspect.

After experiencing a terrible loss, New York City psychiatrist Meredith McCall feels painfully adrift. When she crosses paths with a man with whom she has a tragic connection, she follows him, sparking an unhealthy obsession with Gabriel Wright. How is he doing so well while her life is in shambles? But when Gabriel walks into her office as a patient, seemingly unaware of who she is, she knows it crosses all ethical and moral bounds to treat him. Yet, Meredith can’t bring herself to turn him away and becomes further entangled.

At loose ends after the devastating death of her mother, Una Richardson responds to an advertisement for a ladies’ companion, a position that leads her into the wealthy, secluded world of Mrs. Elspeth McKenzie. But Elspeth's home isn’t the comforting haven it seems. Kathryn, her cold and bitter daughter, resents Una's presence. More disturbing is evidence suggesting two girls lived here before her.

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?

Socially awkward Chloe Cooper divides her time between dog walking, bartending, caring for her ailing mother, and at a safe distance, watching people and inventing the stories of their lives. Like Chloe’s new neighbors: glamorous influencer Jemma Spengler and Jemma’s husband, Adam, a renowned surgeon. They’re attractive, wealthy, and in a house of open windows, so exposed.

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.

Best friends Lindsey, Kendra, and Dani endure every parent’s nightmare when a tragic accident befalls their teenage boys, leaving one dead, another in a coma, and a third too traumatized to speak. Reeling from the worst night of their lives, the three mothers plunge into a desperate investigation of the bizarre incident. How could something so horrible happen in their wealthy Southern California suburb? They soon discover that the accident was just the beginning, and troubling discoveries lead to chilling questions: Do they really know their children? Do they even know each other?

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.

Rosie and Chad Lowan are barely making ends meet in New York City when they receive life-changing news: Chad’s late uncle has left them his luxury apartment at the historic Windermere in glamorous Murray Hill. With its prewar elegance and impeccably uniformed doorman, the building is the epitome of old New York charm. One would almost never suspect the dark history lurking behind its perfectly maintained facade.

Our love story is simple. I met a gorgeous woman. We fell in love. We had kids. We moved to the suburbs. We told each other our biggest dreams and our darkest secrets. And then we got bored. We look like a normal couple. We're your neighbors, the parents of your kid's friend, the acquaintances with whom you keep meaning to get dinner. We all have our secrets to keeping a marriage alive. Ours just happens to be getting away with murder.

Joe works at a facility that performs human experimentation. His work just followed him home. The government wanted to unlock hidden abilities in the human mind. They put subjects in extreme sensory deprivation. All the test subjects went violently insane. But the research continued. Today it has been perfected. Almost perfected.