When Mary receives a blank diary as a present, she thinks nothing of it. Until she opens the diary, and sees it’s not blank after all.

She should have been safe. But she never came home. Kath has lived on the same London estate for decades. Lately she’s become friendly with the little girl next door, who is often left alone for hours while her mum is at work. They have a system. When Mina gets home from school to the empty flat, she knocks on the wall three times. Knock, knock, knock. I’m home safe and sound. But one day Mina’s knock doesn’t come. Kath raises the alarm and the police begin the search. Kath was the only person looking out for Mina—now she might be the only one who can bring her home.

Lizzie has been in love with her colleague Dean for three years but he’s never given her a second glance. When a job offer in London promises to launch her art career, she finally feels ready to upend her life in pursuit of her dream…until the night of the office Christmas party when Dean confesses his love for someone else—Rebecca, one of Lizzie’s closest friends. A few days later, the police show up on her doorstep. Rebecca is missing.

On the evening of their wedding anniversary, Ali and Matthew are involved in a fatal car accident. Grief-stricken, Ali can’t bring herself to believe that her beloved Matthew is gone. The smell of his aftershave lingers in their bedroom. His voice still rings out on their answerphone. She sees his face in the eyes of strangers. But as the months pass, and her family and friends rally round, Ali starts to uncover secrets that Matthew kept from her.

My name is Lucy Townsend. I was born on Friday the 13th, and I was the 13th girl living in the big house. Unlucky for some. But I was the fortunate one. I escaped. The only one who made it out alive. And now, 20 years after that fateful night, the secrets of the past and what happened in that house are pulling me back. I might not be so lucky this time.

Ten-year-old Annie Warren hasn't made it home from school and with every passing hour, hopes of finding her alive are fading fast. Her parents, Cathy and Kit, are frantic with worry, fearing the worst. Could their daughter, the miracle child who came as a surprise to them both, have been abducted? The police are coordinating a massive search but seem totally clueless, while the Warrens' home is under siege from a news-hungry press pack crawling over themselves to cover the story.

Marissa Irvine arrives at 14 Tudor Grove, expecting to pick up her young son Milo from his first playdate with a boy at his new school. But the woman who answers the door isn't a mother she recognises. She isn't the nanny. She doesn't have Milo. And so begins every parent's worst nightmare. As news of the disappearance filters through the quiet Dublin suburb and an unexpected suspect is named, whispers start to spread about the women most closely connected to the shocking event. Because only one of them may have taken Milo - but they could all be blamed.

Beth has the perfect life. She has constructed it carefully over the last eighteen years. But one night she makes a choice that risks everything. When Kat sees an article about that night online, buried memories begin to surface. She and Beth were friends once. Things ended badly then, but now she has a chance to make things right. Kat introduces herself to Beth. Not as her old friend, but as a stranger. Beth has no idea Kat isn’t who she says she is. But then neither is Beth.

New Orleans: live music, endless drinks, brightly coloured attractions, the perfect place for a party. The bachelorette begins on a Friday night; all six women are excited for a chance to escape their everyday lives. But then friendly rivalries turn vicious, and a game of truth or dare turns deadly. By the end of the weekend one of them will be dead.

Rose Grahame had everything Alex D’Arcy dreams of. A handsome husband, a stunning home and a baby boy with twinkling blue eyes and a smile that would brighten the darkest of days. It’s a stark contrast to Alex’s life - her dead-end job, her borderline addiction to drink and pills, her failed engagement and her cluttered flat. But the women’s lives are about to collide - and nothing will ever be the same again.

When Romilly says goodbye to her new baby daughter, abandoning her at the hospital hours after giving birth, no one can understand why she would leave - and where she has gone. In those first few hours, she had been the image of a doting mother and would have done anything to protect her baby. Something has clearly gone wrong. Could it be that Romilly is suffering from postpartum psychosis, just as her mother did? Or is something even worse at hand? A danger so grave that she would leave her longed-for daughter to escape it.

Before my world came crashing down, I had it all. The successful career I dreamed of. The beautiful red-brick home where I could relax in front of the fire. The handsome, devoted husband whose blue eyes and charming smile always made me feel safe. As I call time of death, my voice is steady. My colleagues stand hushed around me, their eyes on me, confused, concerned.

DI James Walker is ready for a quiet family Christmas in the sleepy village of Kirkby Abbey. But when he opens an early Christmas present left on his doorstep, he soon realises it is no gift. Inside is a gruesome surprise and a promise - 12 days, 12 murders. Not long after, the first body is found, half frozen in the snow. As the blizzards descend, panic spreads through the remote Cumbrian village - there’s a killer amongst them, and with 11 more victims to go, anyone could be next.... Can James stop the killer before they strike again?

Never question a mother’s intuition. My water isn’t supposed to break while there’s a storm raging, when my husband isn’t on the island, and as the power flickers out. Darkness covers the cabin as I cling to my belly. I never imagined it happening like this. Trained as a midwife, I know I can deliver my daughter.

When happily married Grace comes home early one night and catches her husband, Dominic, with another woman in the cabin at the bottom of their garden, she is shocked, angry, and most of all, hell-bent on revenge. That’s why she acts quickly, locking the pair in the cabin while she decides what she wants to do to them.