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.

When Claire sees Hannah Wilson at an exclusive Manhattan hair salon, it's like a knife slicing through barely healed scars. It may have been 10 years since Claire last saw Hannah, but she has thought of her every day, and not in a good way. So Claire does what anyone would do in her position - she stalks her. Hannah is now Mrs. Carter, living the charmed life that should have been Claire's. It's the life Claire used to have before Hannah came along and took it all away from her.

When Nick’s wife Kerry falls ill and dies, he realises for the first time how fragile his happiness has always been, and how much he’s been taking his good life and wonderful family for granted. Now, he suddenly finds himself navigating parenthood alone, unsure how to deal with his own grief, let alone that of his teenage son, Olly.

Claire has everything she’s always wanted. A newborn baby. A doting husband by her side. A picturesque home in the countryside. But behind closed doors, Claire’s life is falling apart. Her husband is barely ever home, she’s struggling to bond with her baby girl, and she swears that she is being watched in the remote, lonely cottage. And when a threatening note is posted through her letterbox, saying she doesn’t deserve her daughter, it’s clear that someone knows about the terrible mistake that Claire made.

Nathan West loved his wife Laura with all his heart. But now she’s gone, taken from him in a seemingly random act of violence. Laura was the glue that held their family together. And for Nathan, life without her feels almost meaningless. As he tries to find hope in the darkness, his three young daughters express their grief in different and challenging ways - with one set on a path of self-destruction that could devastate their family all over again. 

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.... 

Of the four of us only three remained, and there was no going back from that. Emily and Josephine have always shared everything. They’re sisters, flatmates and best friends. It’s the two of them against the world. When Emily has the perfect wedding and Josephine finds the perfect man, they know things will change forever. But nothing can prepare them for what, or who, one of them is willing to give up for love. Four people. Three couples. Two sisters. One unforgivable betrayal.

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....

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.

Tamra never dreamed she would marry someone like Mike Mitchell: handsome, rich, a wonderful husband...until she finds out that Mike is having an affair. But Hell hath no fury like a woman scorned, and Mike Mitchell should have remembered that before he made a fool of her. Because Tamra knows something about Mike. Something he did. Something evil. And she was prepared to carry the secret to her grave. Not anymore.

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.

Thomasina "Hitch" Waycott loves living and working on the remote family farm and B&B. But she also wants more. To see the world. To own her own home. To fall madly in love. But those are fairy tales, and if her life is a fairy tale, then she’s the ugly duckling. Her deformed lip, her crooked limbs and her weak heart have kept her from taking chances. But that’s about to change. When Grayson Potts comes to stay, he’s unlike anyone Thomasina has ever met.

In the middle of the night, Claire wakes up to discover that her beloved daughter, Julia, is dead - and life, as she knows it, is over. Searching for answers, Claire stumbles upon a pile of letters, hidden under Julia’s bed in an old, battered shoebox, and feels closer to her daughter than ever before. They tell her that Julia was happy, that she was thriving at university, that she was in love. But as the letters go on, Claire starts to feel uneasy at something hidden between the lines. Even as she grieves, she must prepare to face a shocking discovery. 

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....

Kirstie Rawlings is jolted awake by a child crying. Racing upstairs to check on her newborn, she is plunged into every parents’ worst nightmare. She hears an unknown voice in the baby monitor, saying: "Let’s take the child - and go." Is someone trying to steal her little girl? In the bedroom, her daughter is safe asleep in her cot. Is the voice coming from a nearby house? But there aren’t any other children living on her quiet country road....