Mark and Melissa Cain are thrilled to have found Jade, a babysitter who is brilliant with their young children. Having seen her own house burn to the ground, Jade needs them as much as they need her. Moving Jade into the family home can only be a good thing, can’t it? As Mark works long hours as a police officer and Melissa struggles with running a business, the family become ever more reliant on their babysitter, who is only too happy to help. And as Melissa begins to slip into depression, it’s Jade who is left picking up the pieces. But Mark soon notices things aren’t quite as they seem. Things at home feel wrong, and as Mark begins to investigate their seemingly perfect sitter, what he discovers shocks him to his core. He’s met Jade before. And now he suspects he might know what she wants.

Emily and Jake are the perfect couple. Or so everyone says. But Emily just read a letter that has shattered her perfect world. Now she only has one thing on her mind. Which one of her friends is sleeping with her husband?

Tucking her little boy Ollie into bed one night, Sarah notices his beloved teddy bear, which she bought him when he was born, is missing and in its place is a new toy given to him by her ex-husband’s new girlfriend, Laura. When she asks Ollie about it, he begins to shift uncomfortably before whispering, "Laura told me a big secret, and she said I can never tell you." Soon, Ollie is asking to spend more time with his dad and Laura, and shrinking away from Sarah. Then, when she calls to him in the garden one day, Ollie doesn’t answer back. 

Rebecca only wanted to help out - to be kind. Richard seemed so alone after his wife, Nicole, died, and Rebecca wanted to make sure he knew he had someone on whom to rely. But now, she’s in Nicole’s immaculate house. Drinking from her favourite crystal wine glass. Keeping shoes in her orderly closet. Comforting her sweet and grieving stepdaughter. It feels like Rebecca is living another woman’s life.

When I pick my beloved daughter Poppy up from school one afternoon, my mind races when I see the little girl holding Poppy’s hand. With the same heart-shaped face, long brown hair, and dark eyes, the two girls look identical. In fact, they look like sisters. Is the secret I’ve been holding on to for so long about to be revealed? 

She bursts into my life like a storm, and nothing is the same again. One by one, I watch as my friends fall under her spell. Only I see that her smiles don’t reach her cold, furious eyes. And when I’m accused of things I didn’t do, when my home is vandalized, I know she’s behind it. But she only lets her mask slip when no one is looking, so if I say anything, I’ll look crazy. So when the baby shower comes around, I’m sitting on a velvet sofa in a posh hotel room, surrounded by balloons. But that afternoon, I finally learn the unbelievable truth. There is no baby....

It was supposed to be the happiest day of her life. Zoe was sitting in her hotel room, in her perfect white dress, looking forward to the moment when she would make kind, handsome Toby her husband. Then, there was a blank. They said she must have fainted, overcome with emotion. But nothing felt quite right afterward. Did something happen in that missing time? 

The white-washed Italian villa is perfect. I thought it might feel odd, living in a stranger’s house for the summer, but as my husband and children swim in the infinity pool, I start to relax. And then, in the back of a wardrobe, I find something that shatters everything.... Sparkling green eyes, square jaw, lopsided smile. A young man with his arm around a beautiful woman. The picture is old and faded, but I’d recognize him anywhere. The man is my husband.

Eva Curtis is a pathological perfectionist whose attention to detail means she never makes mistakes – until one slip-up leads to the death of a patient and the end of her career.

I watched you move in next door and thought we might be friends. I saw you watching from the window - and knew I’d have to keep you well away from my husband. I started to trust you. Confide in you. I started to mistrust you. Suspect you. I was confused when I blacked out after an evening at your place. Was I really that drunk? I came up with a plan. A plan to make you both pay.

Ava only left her daughter in the pushchair for five minutes. The buckle was fastened, and she was sure it was safe. But when she came downstairs, the door was open and Abi was gone - she walked down the road, past the Lovegoods' house, and was never seen again. A year later, the Lovegoods throw a housewarming party, showing off the results of their renovation. Ava doesn’t want to go. She can’t bear to look down that end of the road, to see the place where Abi vanished, and she doesn’t want to spend time with people who don’t share her grief. 

Sara made one promise to herself when she was growing up in foster care: that if she was lucky enough to have a family, she’d always do whatever it took to protect them. Looking around her home with its cozy kitchen and living room, where her energetic teenage daughters and gorgeous 4-year-old son all eat, play and live together, she knows she’d do anything to keep them safe. So when Sara’s husband Matt loses his job and every shred of his confidence with it, she knows it’s up to her to bring the family back from the brink.

Jenna is a wife, a mother, a doctor. She’s also the victim of a stalker. Every time she leaves her house, she sees him. Disturbing gifts are left at her door. Cruel emails are sent to her colleagues. She has no idea who this man is, but she feels powerless against him. Until the day he is brought into her hospital after a serious accident, and Jenna is given the chance to find out once and for all why this man is tormenting her. Now, the power is all hers.

Kate and Lauren. Sisters who are always there for each other. But as they gather for their weekly Sunday lunch, a knock on the door changes everything. The new arrival, Jess, claims to be their half-sister, but that would mean the unthinkable. That she’s the secret daughter of their beloved, recently deceased father, Harry. Their mother, Rose, is devastated and Kate and Lauren refuse to believe Jess’ lies. But as the fall-out starts, it’s clear that each is hiding secrets and that perhaps this family isn’t as perfect as they appear.

Jenny has just given birth to the baby she’s always wanted. She’s never been this happy. Her husband, Leo, knows this baby girl can’t be his. He’s never felt so betrayed. The same night, a vulnerable young woman, Hannah, wakes to find her newborn lifeless beside her. She’s crazed with grief. When chance throws Hannah into Leo’s path, they make a plan that will have shattering consequences for all of them. Years later, a 16-year-old girl reads an article in a newspaper and embarks on a journey to uncover the truth about herself.