ME: Staring down at the sweet baby in my arms, I feel panic instead of love. Because this isn’t the child I gave birth to. My husband whispers to the midwife. They all think I’m going crazy. But the tiny boy in my arms is crying again. I’m certain: he knows I’m not his mummy. And I’ll do whatever it takes to get my son back.

I’ve been married to my kind, loving husband Lachlan for over twenty years. He’s my everything. We have two teenage children, a beautiful home and I feel so lucky to live this perfect life. Until my best friend says something that makes me doubt everything… She whispers it’s strange Lachlan has lived nearby to two unsolved murder cases. First, the murder of the woman in the small, Scottish village where he grew up and more recently the shocking death of a woman who lived round the corner from us. The thought makes my head spin. It’s just a coincidence, surely?

Wife: I couldn’t be prouder of my charming husband and quiet and kind son. I’ve poured everything into my little family, so I choose to ignore my husband’s late-night phone calls and wandering eye. I won’t let anything ruin my perfect life…

When Megan loses her beloved husband, Rick, in a tragic car accident, she feels like it’s her own life that has ended. She feels too young to be a widow. Walking around the house that had been their home – so quiet without him – nothing feels the same. But at his funeral, she sees a face she doesn’t recognise. A heavily-pregnant young woman, with a sweet heart-shaped face that is somehow a little familiar. This stranger introduces herself as Emily, Rick’s estranged sister. She explains how she’s been searching for her brother for years, but she knows she’s too late now.

Sarah Westfield is unhappily married to perfect husband Nick. Handsome, devoted and kind, he should be the ideal man for her, but Sarah knows their marriage is the biggest mistake she’s ever made…and she wants out. But then Nick offers her one last chance to make their marriage work – a baby. Sarah is horrified – a baby would tie herself to this man forever…wouldn’t it? Or could it be exactly what she needs?

Some secrets refuse to stay buried... Abandoned by her mother, Lucy Mitchell grew up in foster care, where she found solace in her best friends, Amber and Josh. In a strict foster home, Lucy and Amber made a pact – friends for life – often escaping to the woods to hide from their overbearing carer, Linda. Then, one day, only one of them comes back. Amber was gone, leaving behind only a note: I’ve run away. Fifteen years later, Lucy is planning her dream wedding to Josh – until a body is discovered.

New mum Lucy couldn't be more in love with her twin baby boys, but with her husband Andrew's return to long hours at work, she's left to deal with the sleepless nights alone. When her best friend Nina suggests they hire a night nanny, Lucy jumps at the opportunity - much to the distaste of her overbearing mother-in-law. But Evie is a natural with the boys and the extra sleep means the days are more manageable. Slowly but surely, Lucy is a finding a way back to her old self. Then things begin to go missing, the doubts start creeping in and Lucy finds she can't keep track of the truth.

As if my mum breaking her hip and being rushed to hospital isn’t shocking enough for one day, now in her post-operative delirium, she’s just told me I’m not her daughter. That she has never been able to have children. The nurse reassures me that people are often confused after a trauma. But I know this woman so well and I can tell there’s a grain of truth in what she says. Which begs the questions: Who am I? Where did I come from? When I dig into the truth, I suddenly stir up a hornet’s nest of secrets, lies – and possibly a crime so unfathomable – that stretches back decades.

All I’ve ever wanted is to be a mother. And as soon as I looked into the beautiful, bright blue eyes of this baby tucked in her blanket, my world felt complete. Stepping into the cold air outside of the hospital doors, a shiver runs through me. I know my life will never be the same again. I slip off her little white medical bracelet and put it in the pocket of my jeans. I think of the woman upstairs in the hospital room who will soon return and find her child gone. I hesitate. Am I doing the right thing?

Standing in my bathroom, the luxurious marble tiles cool under my feet, I stare at the test in my trembling hand. The second line is unmistakable: I’m pregnant. This is all my husband Theo and I have ever wanted, but I didn’t think it was possible. I should be excited, but all I can think about is telling my stepdaughter. Because Ellie’s always hated me, ever since she realised it was no longer just her and Theo. Now she’s seventeen, beautiful and smart–smart enough to see through me. And if Ellie decided to uncover my secrets, it wouldn’t be just my marriage at stake… it would be my life.

After the year Aidan and I have had, we needed some respite. My husband is overworked, whilst I'm anxious about the past, so renting a night at this converted barn house in the countryside seems like the perfect place for the pair of us to relax and unwind. It might be situated at the bottom of a large garden, but it's private enough that we don't have to mingle with the homeowners who live nearby. Or at least that's what I thought . . .

When Tuppence was born, I thought I was complete. Even when my marriage to Leon began to falter, at least I had my baby girl to look after. Adults have problems all the time, but children have a way of making them seem so insignificant. But then Tuppence goes missing and I realize how my life has been teetering on the brink for so long. Now it's just me and my husband again, the two of us and all our problems, and we're forced to work together as a team to get our beloved daughter back.

I’ve never felt welcome in my husband Dominic’s family home. His parents make it clear I’m a poor comparison to his perfect first wife, Carla. But we’re here for Christmas, so it’s important to pretend everything is fine. Until Dominic’s mother bustles into our bedroom. Smiling thinly, she blindsides me: ‘You won’t mind, will you. Carla is coming for the holidays. She’s still one of the family to us, and she can’t get home because of the storm.’ My eyes widen—did she and Carla plan this on purpose? I know Dominic won’t say a thing. He never stands up to his parents.

I look at our neighbours gathered in the garden for our annual summer barbeque, sipping chilled wine and smiling at my two daughters sprawled on the grass. I go inside to help refill glasses and then I hear it. A shrill scream that stops me in my tracks. I race outdoors to silence, a sea of bewildered faces. My first thought is for my girls, but they are there unhurt. With relief, we push the chilling sound to the back of our minds, returning to our drinks and conversations like it never happened.

I’ve been keeping a secret. From my colleagues, my friends and most importantly, my husband - who knows nothing of my past life. Twenty years ago, at college, a boy became obsessed with me. Craig Lane believed he could make me love him back if he just tried harder. When I rejected him, he did something so horrifying, it’s the stuff of nightmares. All my nightmares. Now I’ve been informed by Victim Support Services, that boy - now a man - has been released from prison. The news terrifies me. Am I safe? Or does Craig still carry the same obsession he did when we were seventeen? I don’t know.