She’s the shoulder you cry on when the father of your children disappears. She’s the person you turn to when he comes back, begging for forgiveness. She’s by your side when you discover his guilty secrets. She helps rock your babies to sleep when they cry. She’s your friend when you have no one else. She’s the woman upstairs, whose feet you hear treading above as you drift off at night, thankful you aren’t alone.    

I know you. I know you in a way you can’t even imagine. I have been searching for you in the years since you wrote that letter - the letter that told me you were looking for me too. But now that I’ve found you, I don’t know if I can say the terrible truth of what I am. It would ruin your perfect life. It would hurt your beautiful daughter. So, I hesitate - bide my time, for now.

An eight-year-old girl, Chelsea Compton, is missing in Pine Valley, California, and for Detective Katie Scott it’s a cruel reminder of the friend who disappeared from summer camp 20 years ago. Unable to shake the memories, Katie vows she won’t rest until she discovers what happened to Chelsea. But as Katie starts to investigate, the case reveals itself to be much bigger and more shocking than she feared. Hidden deep in the forest she unearths a makeshift cemetery: a row of graves, each with a brightly colored teddy bear.

Suzi did a bad thing. She’s paying for it now, pregnant, scared, and living in an isolated cottage with her jealous husband, Nick. When Nora moves into the only house nearby, Suzi is delighted to have a friend. So much so that she’s almost tempted to tell Nora her terrible secret. But there’s more to Nora than meets the eye. It’s impossible - does she already know what Suzi did?

It’s a beautiful day for a wedding. White roses scent the air and the summer sunlight streams in. A spoon chimes against a champagne flute and the room falls silent. And there he is - my husband - getting to his feet to propose a toast. He’s still handsome. His new wife is next to him, gazing upwards, oblivious. I’m not supposed to be here. All these years in the same town and I had no idea until I saw his name on the seating plan. He lived with me, once. Loved me. Small-town memories are long, but the people in this room don’t want to remember.

One hot summer night, 15-year-old Olivia comes home late from a party she was strictly forbidden from going to, and she and her mother, Hannah, start arguing. Soon Olivia speaks the words that every parent has heard from their teenage child.

Milly always dreamed of being a mother. Adopted herself, she has always imagined a powerful, intimate connection with a child of her own. So when she and her husband Matt are told they can’t have children, her dreams are shattered. But then their loved ones offer the ultimate gift - Milly’s best friend Anna and Matt’s brother Jack will be donors, so that Milly can finally have a chance to be a mother. Except none of the four people involved are prepared for the feelings that will threaten their most important relationships as their daughter receives a heartbreaking diagnosis.

Mags Barkworth still suffers the effects of a life-changing tragedy over a decade ago. She knows her husband loves her. She knows he would never do anything to hurt her, or their daughter. But what if the voice in her head, the one she's pushed away with therapy and anti-depressants, is telling the truth? What if it's all a lie? When Tam, their daughter, draws an uncannily detailed picture of a place she's never been, Mags's life starts to unravel. But even in her most paranoid moment, Mags could never have guessed the secret she is destined to uncover.

Megan waits at the school gates for her six-year-old son, Daniel. As the playground empties, panic bubbles inside her. Daniel is nowhere to be found. According to his teacher, Daniel’s father picked up his son. Except he and Megan are no longer together. After years of being controlled by her cruel husband, Megan finally found the courage to divorce him. Hands trembling, she dials his number, but the line is dead. Six years later, Megan gets the call she has dreamt about for years. Daniel has walked into a police station in a remote town just a few miles away....

When Mel arrives at the holiday cottage in the Lake District, she expects to find the heating on and her husband, Luke, and the two children waiting for her. Maybe a bottle of wine open....Instead, there is just a note on the side, saying they’ve gone out for a walk. But they aren’t back several hours later, and Mel knows something is wrong. Really wrong. When a search doesn’t find them, she has to confess to the police that her marriage isn’t all that it seems. Even if that risks her own secrets being revealed....

When single mother Darcy’s son falls from a rope bridge at a local playground, life stands still. She clutches his small, limp body, frozen, until a pair of strong hands push her aside, and she watches as George, a local doctor, saves her son’s life. George, with his twinkling hazel eyes, easy charm and lack of wedding band is almost too good to be true, but coffee becomes lunch, lunch becomes dinner, and soon they can’t go an evening without seeing each other.

Two-and-a-half-year-old Holly is playing happily in a pink, plastic playhouse, while her mother Rachel sips coffee and chats with a friend nearby. It should be an ordinary day for all of them. But, in the blink of an eye, it turns into every family’s worst nightmare. Holly is taken by a stranger and never found. Nine years later, Rachel is living a quiet life in Dorset. She’s tried to keep things together since the traumatic day when she lost her eldest daughter.

Twenty years ago Emily Mills’s father was murdered, and she found his body hanging in the backyard. Her younger sister, Madison, claims she was asleep in her room. Her older sister, Tara, claims she was out with friends. The tragedy drove their mother to suicide and Tara to leave town forever. The killer was caught. The case closed. Ever since, Emily and Madison have tried to forget what happened that night - until an eerily similar murder brings it all back. It also brings FBI special agent Zander Wells to the Oregon logging town.

Chloe had the dream wedding. Dan is her perfect man. They haven’t known each other for long, but as she walked down the aisle and saw him standing by the altar, tears glistening in his eyes, she knew this was forever. Later, as they relax on a beautiful island, settling in to their new married life together, they congratulate themselves on their lovely wedding day, and Dan jokes that he’d like them to stay there forever. But as the honeymoon goes on, he becomes increasingly adamant. They shouldn’t leave. In fact, he won’t let her.... 

Newly divorced Jo is delighted to move into her best friend’s spare room almost rent-free. The high-tech luxury Camden flat is managed by a meticulous home assistant, called Electra, that takes care of the heating, the lights - and sometimes Jo even turns to her for company. Until, late one night, Electra says one sentence that rips Jo’s fragile world in two: ‘I know what you did’. And Jo is horrified. Because in her past she did do something terrible. Something unforgivable.