The letterbox clatters and sitting on the mat is a piece of paper, in black and white, with everything needed to blow Anna’s perfect life apart. A baby scan photo. Anna and Jon have been trying for a baby with no success, so after years of disappointment, this feels like a kick in the teeth. Who sent it? And why?

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 push open the door to the beautiful French villa and my clever, handsome husband and adorable wide-eyed children follow me inside, taking in the breath-taking view. This should be a blissful summer break, filled with sun, swimming and relaxation but the truth is very different. Because my husband has just revealed the real reason we’re here. When our friends staying at the sprawling villa greet us on the sun-soaked terrace, I smile brightly and attempt to calm my nerves.

Charlie takes my breath away from the moment we meet, when he is dropping his adorable little girls off at the school gates at the same time as I’m waving goodbye to my son. Being a single mother has been hard. So when his gorgeous green-blue eyes hold mine and his lips curve into a smile I wonder if this is my chance to find happiness and escape the secrets in my past.

I used to enjoy my job. I was good at it and felt fulfilled. I also used to enjoy spending time with the people I worked with. They say you spend more time with your work colleagues than you do with your family members, but that was fine by me because I made two very good friends at the office. I also allowed myself to get a little too close to my boss, but I soon realized that was a mistake. Unfortunately, it was too late by then, and as my personal and professional lives quickly blurred into one, that was when everything changed.

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.

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?

My husband, Marcus, and I used to be so in love. But now, after ten years together, we barely talk. I've seen so many of our friends marriages end in divorce, and I'm prepared to do whatever it takes to stop that from happening to us. And then I meet Erin. She tells me all about her perfect marriage to Kieran, and I'm shocked when she reveals the secret to their marital bliss they have an open marriage. My heart starts to race as I consider it for me and Marcus. Could we really do this?

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.

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.

Ethan gently squeezes my hand as he slides the golden ring onto my finger. But I know we aren’t worthy of happiness. As I look down at my wedding ring, in a blistering flash, I suddenly remember another piece of that pitch-black, rainy night… but I try to focus on Ethan’s gorgeous blue eyes. I know exactly what he’s thinking. We can never tell. All our family, friends and loved ones smile as they watch Ethan and I promise to be together until death us do part. But only we know what that really means…Because we have already killed someone.

Emily has the perfect life. The perfect husband. The perfect daughter. But she also has the perfect secret. One that could destroy everything she holds dear... one that could ruin her.

Hannah Parker is a woman who always gets what she wants. When her current husband discovers she has been lying to him – again - she knows it’s time to move on and find someone who can give her the life she desires… The life she knows she deserves. But who will be the lucky man? When her eye catches a glimpse of an old flame in a photograph, she’s sure it’s a sign.

She knows everything about you… but can you trust her? I walk in to my interview with Ava Green and carefully hand over my application. It’s all made up, of course, but Ava doesn’t have to know that. There is so much worry in her blue eyes. Her phone pings with constant messages and a small stain marks her crisp shirt. Breakfast with her two little girls before heading out to this high-flying job every morning can’t be easy. Ava needs me, I think. More than anything.

Caroline twitches aside her curtains to see the new family moving in. A mother – beautifully dressed in expensive clothes – and two young children. Where is her husband, she wonders? And why are they moving in to the smallest house on the street? They really don’t seem the type. But Caroline believes it’s important to be welcoming. It’s important to know everything that’s happening on West Street.

Naomi is devastated when the sale of the apartment falls through, her dreams of moving to an amazing ‘forever home’ nearby with her family are momentarily dashed. But then a sweet-natured single mother named Summer appears, announcing her intention to buy Naomi’s old apartment. And all of a sudden, it looks like Naomi might get her new house after all. At first, it feels like Summer’s saved her life. But as soon as the sale goes through, Summer starts turning up at Naomi’s new house. She’s enrolled her child in Naomi’s daughter’s class. She’s dressing like Naomi.

Hannah Parker is a woman who always gets what she wants. When her current husband discovers she has been lying to him – again - she knows it’s time to move on and find someone who can give her the life she desires… The life she knows she deserves. But who will be the lucky man? When her eye catches a glimpse of an old flame in a photograph, she’s sure it’s a sign.

I was so nervous about someone new joining our house share. After everything that happened with my parents, my friends are like my family. Our imperfect, but well-loved house is the only place where I can be myself. But when Poppy knocks on our door, blonde hair, wide eyes, and a friendly smile, we all agree she’s a perfect fit. I just wish I could shake the feeling that I’ve seen her before…

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.

My delicate newborn, Lola, is just perfect. She’s made our family complete. My wonderful husband Max has his own children. He doesn’t like to talk about his first wife – and I knew it would be hard, becoming a stepmother. But now I have a child of my own. I can forget about the past.

Fiona Fisher lives a quiet and contented existence. A former nurse who married Jason, the doctor of her dreams, she is now a mother to his two daughters and living in the sort of cosy village home she’d always wished for.

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?

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.

Everything my husband and I have always dreamt of has finally come true. Our new home with its open-plan kitchen and marble countertops couldn’t be further from the small, damp flat where we lived only months ago. I’d hoped this would be our fresh start, an escape from my past, but the handwritten note that arrived on our doorstep makes my blood run cold – you don’t deserve this life.

For two years Lucy and Sam renovated their beautiful Victorian home but spiraling debts are forcing them to sell. The agreement with their real estate agent is that they won’t be home for viewings, but when Lucy gets a voicemail saying the Agent is running late, she realizes she will have to show the prospective buyer around herself. Suffering from extreme anxiety and claustrophobia, Lucy watches the stranger on their doorstep waiting to be let in.

After meeting Jamie’s smiling blue eyes across a crowded bar, I tell myself, that after my recent divorce, this is the bit of fun that I need. It is the biggest mistake I’ve ever made. Because when I return to his flat the next day, excited to see him again, I am horrified to discover he has been murdered. I know I should tell the police, but I can’t be the person to call them. With my past they will just assume the worst…

Alex and I haven’t been dating for very long when I go to his place for the first time. Feeling self-conscious as I notice a thread coming loose on my dress, he pours me a glass of wine and I take in the pristine room and expensive furnishings. Everything here is perfect, too perfect. Where are the personal touches, the souvenirs from his life? Where are the photos of his friends and family? ‘You can trust me,’ Alex says as he hands me the wine, and my heart beats wildly in my chest. I really want this to work, especially after the disaster of my last relationship.

Kate and Pete have been the perfect couple ever since they were teenagers. Fifteen years later, they have two young daughters, live in a beautiful London townhouse, and seem like they have it all. But one day, Pete leaves for work and never comes home. In a note Kate discovers, he confesses that he’s been unhappy for a long time and that he’s met someone else. Distraught, she later learns that he has left everything behind, including his mobile phone, and she sets out to learn the truth about his disappearance.

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…

This is the day my life changes forever. It started so normally. The alarm went at 7am. My husband made bacon and pancakes for me and our seven-year-old daughter, the kitchen full of chatter and laughter. He gave me a quick kiss, told me he loved me, grabbed his wallet, and rushed off to work. Just an ordinary day. Until I get the call from the school. It was Tom’s turn to pick up our daughter. He must be held up for some reason. I find Tom’s phone under our bed. Now I know there’s something seriously wrong. I scroll through his messages. A text sent late last night: I KNOW EVERYTHING.