When six-year-old Olivia Adams disappeared from her back garden, the small community of Stoneridge was thrown into turmoil. How could a child vanish in the middle of a cozy English village? Thirteen years on and Olivia is back. Her mother is convinced it's her but not everyone is sure. If this is the missing girl, then where has she been - and what happened to her on that sunny afternoon? If she's an imposter, then who would be bold enough to try to fool a child's own mother - and why?

I return home to our beautiful house on a chilly winter evening expecting to find my handsome husband Richard waiting for me by the fire. We’re still so in love, and he always takes care of me. He usually comes straight back from work. But tonight, our antique clock ticks on through the dark evening, with no sign of him. Then a knock at the door shatters my perfect life. A 12-year-old-girl, Alice from the village, has been found unconscious in the field behind our house. They say she was last seen getting into Richard’s car.

Everyone’s invited. Someone will never leave. In a grand townhouse rented specially for the evening, Hannah beams at her guests under the sparkling chandelier. Her sisters, her mother and aunt, her best friends...although she’ll miss them all so much when she moves away, tonight is about celebrating the happy times and raising a toast to the future. But the next morning, one of the guests is found cold and lifeless in their pristine white bed. Hannah is desperate to call the police. After all, it must have been an accident.

They told us he had been missing for nearly two days, that he probably drowned. They told us a lie. Megan was 10 years old when her older brother, Zac, went missing among the cliffs, caves, and beaches that surround the small seaside town of Whitecliff. A decade later, a car crash has claimed the lives of her parents. Megan and her younger sister, Chloe, return to Whitecliff one summer for the first time since their brother's disappearance.

Charley Willis was 13 years old when her parents were killed in their family home and she was found hiding in a cupboard upstairs. Fifteen years later, Charley is marrying Seth Chambers. It should be the happiest day of their lives, a chance for Charley to put her past behind her, but just hours after the ceremony, she is missing. No one saw her leave. No one knows where she is. One thing is for certain…Seth is about to discover he doesn’t really know the woman he just married. And his nightmare is only just beginning.

I pinch the screen to zoom until I’m staring at the face of a ghost. A man with very short hair, staring directly at the camera with piercing brown eyes. He is as he was when I last saw him: wrinkles around the corners of the eyes and a knowing smirk. That’s the expression I see when I can’t sleep. My body tenses. It can’t be him. It’s not my ex-husband. It’s not David. I know that better than anyone because he didn’t walk out on me. He didn’t disappear two years ago and he’s not a missing person. I know that for a fact because I’m the one who killed him.

Rose Denton wakes up in her car. She has no memory of how she got there. But she knows something bad happened.... There’s blood on the windscreen and bonnet - but it’s not hers, and there’s no sign of anything or anyone she might have hit. The last thing she remembers is being in a hotel on a business trip, but now she’s miles away. Back home, her daughter’s boyfriend is missing. The last thing he did was argue with Rose over money. He left no note, no text, no clue as to his whereabouts. The police have questions - and so does Rose.

Lucy gets the same bus every day. She hopes to get a seat to herself, tries to avoid eye contact, and, if she’s really lucky, reads a chapter of her book. But it’s a Friday - and the bus is always crammed at the end of the week. Personal space doesn’t exist. She keeps her elbows close and clings to a pole at every juddering stop. When she gets off, something feels different. An envelope stuffed with thousands of pounds is in her bag. Is it the answer to her prayers, or the beginning of a nightmare? Because, in the end, everything has a price.

Seventeen-year-old Eleanor Parker wakes up cold and alone in the river that twists through her quiet village. She has no memory of how she got there. But she does know that another girl was drowned in the same river the summer before, held under the water by an unknown killer. Determined to unlock the mystery of what really happened to her, Eleanor can't escape the feeling that something awful links her to the previous summer's murder. But will she find out the truth before it’s too late?

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....

Two days ago, the Wilson family checked into the imposing, glass-fronted Lodge, surrounded by snow and perched perilously on the edge of a cliff looking out to a gray sea. Not everyone was looking forward to the family get-together. But mother-in-law Angela insisted the winter trip would help heal their rifts....

Zoe didn't meet her daughter the way most mothers do. She finds five-year-old Maddie alone and dirty on a countryside road. Frightened for Maddie's safety, she picks her up and takes her back to her father, not knowing what she's about to step into. Because Maddie wasn't just lost; she was there to lure her serial killer dad's new victim. After escaping from the clutches of Maddie's dangerous father, she bonds with the little girl. Only Maddie knows what it was like to be at that house. And when no family members come forward to claim Maddie, Zoe decides to adopt her.

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.

From her downstairs apartment in suburban London, Emma has often overheard the everyday life of the seemingly perfect family upstairs - Steph, Paul and teenage daughter Freya - but has never got to know them. Until one day, she hears something that seizes her attention: Freya has vanished and the police are questioning Steph and Paul about their life. Do either of you have any enemies? Anyone who might want to harm or threaten you?

The doorbell rings, just days after my beloved husband’s sudden death. I don’t recognise the woman on our doorstep, with her blonde highlights, a diamond bracelet identical to my own and a bouncing baby boy in her arms. As I show her inside, I notice her eyes grow wide as she takes in our spacious hallway, and the big squashy sofas that we all used to pile on. She glances at the silver-framed family photos and my little daughter hiding behind my skirts. She looks at me, her blue eyes serious. ‘I’m sorry’ she says. ‘I am your husband’s girlfriend. And this is his son.'