Mia's grief counseling practice, The Pleiades, is named for the seven sisters from Greek mythology who were the companions of the Goddess of the Hunt—and who, in some stories, die of grief or are killed to be saved from attackers. Mia has been gathering broken women together for a radical form of group therapy. Amy. Gabrielle. Katy. Brooke. Olivia. Five women crippled with grief by the murders of their sisters—and seething with rage that the partners who killed them all walk free. She just needs one more.

When she was 9 years old, Melody Browne's house burned down, and it took all of her childhood memories with it. Now she's a single mother of a teenage boy living in Central London. She hasn't seen her parents since she left home at 15, but she doesn't mind. She's better off on her own. She works as a dinner lady at her son's school and has no idea where her humdrum life is heading. But one summer's night, a hypnotist inadvertently unlocks memories of her childhood, and her whole life is turned upside down.

Elisa Wright is a mom and wife, living a nice, quiet life in a nice, quiet town. She’s also convinced her brother-in-law is a murderer. Josh has one dead wife and one missing fiancée, and though he grieved for them he starts dating someone new. Elisa fears for that woman’s safety, and she desperately wants to know what happened to her friend, Josh’s missing fiancée.

I gaze at my husband’s once handsome face, so still and pale in the hospital bed. The doctors say I should keep talking. He might be able to hear me even after the terrible accident that left him fighting for his life. But all I have to whisper to my husband is this: "I know what you did."

At an elite private school nestled in the Colorado mountains, Natalie, an office assistant, dreams of having a life like the school moms she deals with every day. Women like Brooke—a gorgeous heiress, ferociously loving mother and serial cheater—and Asha, an overprotective mom who suspects her husband of having an affair. Their fates are bound by the handsome assistant athletic director Nicholas, whom Natalie loves, Brooke wants and Asha needs.

Every family has secrets, and on the hottest day of the year, the truth is about to come out. As a tragedy unfolds behind closed doors, the dawn chorus is split by the wail of sirens. And one by one the families who tried so hard to welcome the Wests begin to realise: Hogarth Street will never be the same again.

When Anna Hartley’s husband, Henry, calls her with a terrible, guilty confession, she can’t believe what she hears. It has to be a bad joke—the mild, predictable artist she married would never hurt a fly, let alone commit murder. But her confusion turns to horror when police find his body washed up on the banks of the Rio Grande.

When Ruby McTavish Callahan Woodward Miller Kenmore dies, she’s not only North Carolina’s richest woman, she’s also its most notorious. The victim of a famous kidnapping as a child and a widow four times over, Ruby ruled the tiny town of Tavistock from Ashby House, her family’s estate high in the Blue Ridge Mountains. But in the aftermath of her death, her adopted son, Camden, wants little to do with the house or the money—and even less to do with the surviving McTavishes.

When Shelby Dawson survives a harrowing attack that should have left her dead, she tries to move past it—for herself, and for her family. Fifteen months later, with the help of her best friend, Mackenzie, she finally feels safe again in the snowy Minnesota town she calls home. But when an anonymous note appears on her windshield bearing the same threats her attacker made, Shelby realizes that her nightmare has only just begun.

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.