You see the people you work with every day, but what can't you see? Amira, Sarah, Paula, Ewan and Charlie have worked together for years - they know how each other likes their coffee, whose love life is a mess, whose children keep them up at night. But their comfortable routine life is suddenly shattered when an aggressive new boss walks in.... Now there's something chilling in the air. Who secretly hates everyone? Who is tortured by their past? Who is capable of murder?

Lucy has dreamt of her wedding day for as long as she can remember. And now the day is almost here. Her nearest and dearest are gathered on an idyllic Greek island and she just knows it's going to be perfect. It has to be. But even the best-laid plans can go horribly wrong. Why are her parents behaving so strangely? Why won't the rather odd lady from the airport stop hanging around? Who is the silent stranger her sister brought as a plus-one? And then they find the body. It's going to be a day to remember.

There are things no-one can prepare you for when your daughter goes missing - you are haunted by her memory. Even close friends can't understand what you are going through, and only in a group with mothers of other lost children can you find real comfort. But as the parents gather to support each other in the wake of another disappearance, a crack appears in the group that threatens to rock their lives all over again. Welcome to the club no one wants to join.

I am missing. Held captive by a blue-eyed stranger. To mark the 12 days of Christmas, he gives me a gift every day, each more horrible than the last. The 12th day is getting closer. After that, there'll be no more Christmas cheer for me. No mince pies, no carols. No way out.... But I have a secret. No-one has guessed it. Will you?

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.

The six of us arrived on that beautiful Greek island dreaming of sun-drenched beaches and blood-orange sunsets, ready to lose ourselves in the wild freedom of a weekend away with friends. On the first night, we swam under a blanket of stars. On the second night, the games began on our clifftop terrace. On the third night, the idyll cracked, secrets and lies whispering on the breeze. And by the final night, there was a body on the rocks below.

A week at a beautiful chateau in the south of France—it should be a straightforward final job for Dora. She’s a smart, stunning and discreet escort and Daniel has paid for her services before. This time, all she has to do is to convince the assembled guests that she is his girlfriend. Dora is used to playing roles and being whatever men want her to be. It’s all about putting on a front. It will be a last, luxurious look at how the other half lives, before Dora turns her back on the escort world and all its dangers. 

Christine and Jessica cross paths working at the advertising agency Christine runs with her husband. These two women are about to uncover the dark secrets of their own traumatic pasts. But they have no idea that they are connected. The shocking truth of what happened at the wedding all those years ago, and what became of Margaret, is going to blow their lives apart in more ways than each of them could ever have imagined....

London. Early morning, June 2019: on the foreshore of the river Thames, a bag of bones is discovered. Human bones. DCI Samuel Owusu is called to the scene and quickly sends the bag for forensic examination. The bones are those of a young woman, killed by a blow to the head many years ago. Also inside the bag is a trail of clues, in particular the seeds of a rare tree which lead DCI Owusu back to a mansion in Chelsea where three people lay dead in a kitchen. Four deaths. An unsolved mystery. A family whose secrets can't stay buried for ever.

2017: 19-year-old Tallulah is going out on a date, leaving her baby with her mother, Kim. Kim watches her daughter leave and, as late evening turns into night, which turns into early morning, she waits for her return. And waits. The next morning, Kim phones Tallulah's friends, who tell her that Tallulah was last seen heading to a party at a house in the nearby woods called Dark Place. 

When young London professional Alex Evans is informed that his sister's body has been pulled from an icy lake in Northern Lapland, he assumes his irresponsible sister accidentally drowned. He travels to the wealthy winter resort where Vicky worked as a tour guide and meets Agatha Koskinen, the detective in charge. Agatha is a no-nonsense single mother of three who already thinks there's more to Vicky's case than meets the eye. As the two form an unlikely alliance, Alex also begins to suspect the small town where his sister lived and died is harbouring secrets. 

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. 

Ellen was just trying to help a stranger. That was how it started: giving a few minutes respite to a flustered young mother sitting opposite her on the train. A few minutes holding her baby while the mother makes an urgent call. The weight of the child in her arms making Ellen's heart ache for what she can never have. Five minutes pass. Ten. The train pulls into a station and Ellen is stunned to see the mother hurrying away down the platform without looking back.

It's every parent's nightmare. Your happy, funny, innocent son commits a terrible crime: murdering a complete stranger. You don't know who. You don't know why. You only know your teenage boy is in custody and his future lost. That night you fall asleep in despair. Until you wake...and it is yesterday. Every morning you wake up a day earlier, another day before the murder. Another chance to stop it. Somewhere in the past lie the answers, and you don't have a choice but to find them.

Laura has spent most of her life being judged. She's seen as hot-tempered, troubled, a loner. Some even call her dangerous. Miriam knows that just because Laura is witnessed leaving the scene of a horrific murder with blood on her clothes, that doesn't mean she's a killer. Bitter experience has taught her how easy it is to get caught in the wrong place at the wrong time. Carla is reeling from the brutal murder of her nephew. She trusts no one: good people are capable of terrible deeds. But how far will she go to find peace?