You wake on a beautiful, remote island. Sparkling blue seas, golden sunsets, barely a footprint in the sand. Yet this is no ordinary escape. Next to the wreck of a plane, a stranger paces. Another sharpens a knife, scoring a list of the dead onto a palm tree. Others watch from the shadows of a campfire - all with untold stories, and closely-guarded secrets.

Erin lives an idyllic life by the seaside with her baby boy and handsome Australian fiancé. She's upbeat and happy - a natural mum. At least that's what her thousands of followers on Instagram think. In the real world, Erin is struggling with anxiety and finding it difficult to connect with her screaming son. So when a famous agent offers to make her the biggest instamum out there, she's over the moon. 

This was meant to be the perfect honeymoon. A five-star beach resort in Vietnam, with white sands, private villas and world-class cuisine. A chance for newlyweds Asha and Ollie Graveney to recover from a tragedy that has left them on the verge of collapse. Except things don't go as planned. When Asha wakes up in hospital after a brutal attack, her husband is nowhere to be found. And paradise has turned into a nightmare....

Julia Blythe is starting again. After blowing the whistle on a fellow surgeon at her hospital, resulting in him being let go, she found herself illegally bullied from the job by her male colleagues who closed ranks against her. No longer willing to endure their campaign of smears and intimidation, she packs her family up and moves to Devon, to start a new life in a new hospital. To Nathan Sloan, who abuses his role as a surgeon as fully and freely as he can, she couldn’t be more perfect.

Carly had thought they’d always live there. The beautiful Cornish cliffside house they’d taken on as a wreck, that Mark had obsessively redesigned and renovated - a project that had made him famous. It was where they’d raised their children, where they’d sat cozily on the sofa, watching storms raging over the sea below. It was where they’d promised to keep each other’s secrets. Until now. Because Mark has fallen in love. With someone he definitely shouldn’t have. Someone who isn’t Carly. And suddenly their family home doesn’t feel like so much of a safe haven. 

Anna Robinson has it all. A loving husband. A son she adores. A close circle of friends. When Anna disappears overnight, everyone is desperate to uncover what happened. Why would Anna leave her perfect life behind? Is she the victim of something more sinister? At the playground gates, it's not long before rumours start to circulate. Someone must know the truth. And as the pressure mounts, it won't be long before they crack.

Just four words were printed in the card. He doesn’t love you. I’ve been dreaming about this day - marrying Adam, my childhood sweetheart, who I’ve loved for 18 years. I didn’t realize the perfect day would turn into the perfect nightmare. I was so excited to send out the wedding invitations, carefully writing everyone’s names on thick cream paper in beautiful cursive script. I had no idea I was inviting someone to destroy our marriage. 

Paige, Richard and me. We thought we’d be friends forever. But everything changed the day we took the shortcut home from school along the old railway line. I wish we’d gone the long way. I wish we hadn’t seen our classmate, pale and still in the undergrowth. And I wish we hadn’t promised to keep one, awful detail a secret just between us.... 

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. 

In a converted Georgian townhouse in south west London, three families live under one roof. The large flat that takes up the top two floors is home to the Harlow family: happily married Paul and Steph and their bubbly teenage daughter, Freya. The smaller first floor flat is rented by Emma, who spends most of her time alone, listening to people coming in and out of the building. And the basement flat belongs to Chris, a local driving instructor, who prefers to keep his personal life private from the neighbours.

Charlotte Morgan knows how it feels to desperately want a baby. As a child, seeing her mum devastated by losing her longed-for babies, Charlotte wished another woman could give her mother what she so craved. Now Charlotte’s a mum herself and knowing how much love her daughter, Alice, brings into her life, she vows to help others achieve their dreams of becoming a parent. When she meets Malcolm and Brenda on a surrogacy website, it seems she's found the perfect couple. In their late 40s, they have wealth and an enviable life, but there’s one thing missing – a child of their own.

Naomi always wanted to be a mother. But three years ago, her husband left, taking their child with him. Now, her daughter has come to stay, and Naomi knows it's her one chance to re-build her family. But the night ends in a terrible accident. And Naomi has no memory of what happened. Panicking, desperate, Naomi finds herself telling a lie...

Charles and Grace wanted a quiet staycation honeymoon, but when their train terminates early due to a storm up ahead, they wonder if they made the wrong decision. Forced to take shelter in the nearest seaside town, Saltwater, they discover that there is only one guesthouse left. Unlike the rest of Saltwater, the Anchorage is entirely deserted. That night, with the storm howling relentlessly, Grace is woken by a child crying. She is haunted by the sound, until Charles convinces her it was only her imagination. But the next day, she finds a warning scrawled in the guest book.

Caitlin has been having an affair for over a year when the country enters lockdown. Suddenly, seeing her lover, Daniel, without alerting her husband becomes almost impossible. When she does manage to sneak to his home, she finds him lying in a pool of his own blood, dead. Ali is a just-about-functioning alcoholic, recently laid off and feeling rather lonely. Each day she goes to her local shop to buy her permitted two bottles of wine, leaving food parcels for neighbours on her way home. While keeping an eye on what they are up to, of course.

Bec and Izzy have been best friends their whole lives. They’ve been through a lot together - the death of Bec’s mother, the birth of Izzy’s daughter, Bec’s engagement. But there’s a darker side to their friendship, too - and Bec is about to reach breaking point. Then Izzy is found broken and bloodied at the bottom of the stairs. It could have been an accident - perhaps she fell - but if the police decide to look for a killer, then Bec is sure to be their prime suspect.