Three years after they narrowly escaped the IRA’s worst punishment for informing, Northern Irish sisters Tessa and Marian Daly have built a new life in Dublin with their young children. Though Tessa is haunted by the abrupt and violent end to her old life, she does her best to immerse herself in the joys of Finn’s childhood and the rhythms of her new job at The Irish Observer. It’s a small island, though, and just as quickly as they disappeared, figures from the sisters’ past surface to drag them back into the conflict.

Joe never wanted to come back to Arnhill. After the way things ended with his old gang - the betrayal, the suicide - and what happened when his sister went missing, the last thing he wanted to do was return to his hometown. But Joe doesn’t have a choice, not after a chilling email surfaces in his inbox: I know what happened to your sister. It’s happening again....

Three years ago, passionate surfer Kenna Ward lost her two great loves—after her boyfriend drowned, she hung up her surfboard and swore off the water for good. But she is drawn back to the beach when her best friend, Mikki, announces her sudden engagement to a man Kenna has never met—a member of a tight-knit group of surfers. Kenna travels to a remote Australian beach, entering a dangerous world far from civilization where the waves, weather, and tides are all that matter. Kenna is tempted back into the surf, and drawn into the dazzling group and the beach they call their own.

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.

Eva Hansen wakes in the hospital after being struck by lightning and discovers her mother, Kat, has been murdered. Eva was found unconscious down the street. She can’t remember what happened, but the police are highly suspicious of her. Determined to clear her name, Eva heads from Seattle to London - Kat’s former home - for answers. But as she unravels her mother’s carefully held secrets, Eva soon realizes that someone doesn’t want her to know the truth. And with violent memories beginning to emerge, Eva doesn’t know who to trust. Least of all herself.

Fifteen years ago, Lilith Wade was arrested for the brutal murder of six women. After a death row conviction, media frenzy, and the release of an unauthorized biography, her 30-year-old daughter Edie Beckett is just trying to survive. She’s a recovering alcoholic with a dead-end city job and an unhealthy codependent relationship with her brother. Edie also has a disturbing secret: a growing obsession with the families of Lilith’s victims. She’s desperate to see how they’ve managed - or failed - to move on. But she’s careful to keep her distance. That is, until she crosses a line and a man is found murdered.

Julie is missing, and no one believes she will ever return - except Elise. Elise knows Julie better than anyone, and feels it in her bones that her best friend is out there and that one day Julie will come back. She’s right. Two years to the day that Julie went missing, she reappears with no memory of where she’s been or what happened to her. Along with Molly and Mae, their two close friends from college, the women decide to reunite at a remote inn. But the second Elise sees Julie, she knows something is wrong - she’s emaciated, with sallow skin and odd appetites.

Audrey Miller has an enviable new job at the Smithsonian, a body by reformer Pilates, an apartment door with a broken lock, and hundreds of thousands of Instagram followers to bear witness to it all. Having just moved to Washington, DC, Audrey busies herself impressing her new boss, interacting with her online fan base, and staving off a creepy upstairs neighbor with the help of the only two people she knows in town: an ex-boyfriend she can't stay away from and a sorority sister with a high-powered job and a mysterious past.

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.

Detective Angie Pallorino hasn't forgotten the violent rapist who left a distinctive calling card—crosses etched into the flesh of his victim's foreheads. When a comatose Jane Doe is found in a local cemetery, sexually assaulted, mutilated, and nearly drowned, Angie is struck by the eerie similarities to her earlier unsolved rapes. Could he be back?

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.

Abigail Baskin never thought she'd fall in love with a millionaire. Then she met Bruce Lamb. He's a good guy, stable, level-headed, kind—a refreshing twist from her previous relationships. But right before the wedding, Abigail has a moment of uncertainty. The drunken one-night stand from her bachelorette weekend, the sexy guy who wouldn't give her his real name, didn't really mean anything, she keeps telling herself. She puts the incident out of her mind. Then the mysterious stranger suddenly appears—and Abigail's future life and happiness are turned upside down.

Frankie Elkin is an average middle-aged woman, a recovering alcoholic with more regrets than belongings. But she spends her life doing what no one else will - searching for missing people the world has stopped looking for. When the police have given up, when the public no longer remembers, when the media has never paid attention, Frankie starts looking. A new case brings her to Mattapan, a Boston neighborhood with a rough reputation. She is searching for Angelique Badeau, a Haitian teenager who vanished from her high school months earlier.

New friends Sam, Margaret and Diana are thrilled to be getting out of the city for a girls’ weekend - they’ve bonded over their messy divorces, and every mile on the odometer feels like another step towards putting their exes in the past. But when car trouble halfway into their trip strands them in the most unlikely of mountain towns, they come face-to-face with the hurts and betrayals they were so desperate to leave behind. When Diana doesn't return home after a night out, Sam and Margaret's search for her reveals just how little they know about their friend.

When Heather McKinley dreamed of becoming a doctor, she imagined curing sick kids and sporting pink stethoscopes. She never anticipated the sleepless nights, grueling exams, and endless labs. And she certainly never knew that her medical school earned the nickname Dead Med thanks to the tragic history of students overdosing on illegal drugs. But Heather would never consider doing anything like that. That is, until her longtime boyfriend dumps her, she finds herself failing anatomy, and her world starts to crumble.