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 take a sip of coffee as I plan my day. My surgeon husband, Cole, slept at work last night, so I had to get the kids ready on my own, again. I can’t complain, though, I’ve loved him ever since we met, long before he became a famous surgeon and the papers started calling him the pride of the hospital. Our latest family photo hangs on the kitchen wall and I remember that day so clearly. Cole screamed at me over nothing, then apologised saying he was stressed at work. My heart pounded with fear, but I plastered a smile on my face for the sake of my children.

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?

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.

How well do you really know your own family? The wife: Eve is desperate for her life to be perfect. Living in a beautiful house, with gorgeous views of the countryside, is all she’s ever wanted. And she’ll do whatever it takes to hold onto her dream life. The son: Joe is a model student; he never puts a foot wrong. He knows his mother wouldn’t tolerate it. Until the night of his sixteenth birthday party, when things go horribly wrong and someone in the house is left fighting for their life. As the blue flashing lights of the police and ambulance arrive, all eyes are on the Griffiths family.

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 Natasha meets Daniel, she knows her life is made. Rich, handsome and charming, Daniel will make the perfect husband. Even if she won’t make the perfect wife…She is thrilled when Daniel suggests an all-expenses paid cruise for Natasha, her friends, Barbara, Tracy Ann and Michelle, and their husbands. What better way to show everyone that Natasha has finally made it? But as the ship sets sail, she learns that far from being the perfect husband, Daniel has terrible secrets that are about to be revealed.

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.

I loved the anonymity, flexibility and solitude that working the night shift at Storage Queen gave me. The unsociable hours paid well, helping me fund my university degree and giving me a quiet place to study while the world slept peacefully in their warm, cozy beds. It was the perfect job for me. But that Friday night proved to be more than I bargained for when a man walked through the door, dragging a large suitcase. My immediate instincts told me something was wrong. That’s when my ordeal began. I just had to make it through the night shift.

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.

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 my first husband died, I thought my heart was completely broken, and that I’d never feel happy again. Until I met Theo. He’s a doctor. A man who seems good and caring and kind. Soon after we start dating, he says he wants to marry me. And even though his grown-up children are less sure about me, to everyone else it’s the second chance for love and happiness I deserve. But the truth is maybe his children are right to be suspicious. Because I know something about Theo. That he was there in the operating theatre the day my first husband died. And I think it was his fault.

I thought my first husband died ten years ago. But now he’s back... Opening the front door, I’m stunned to see a familiar face. I never thought I’d see Freddie’s deep brown eyes and crooked smile again. But how is this possible when he died ten years ago…? It took years to move on, but finally my life is almost perfect.

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.