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. 

Alicia’s been telling lies. And now, they’ve come back to haunt her. When an old colleague turns up at a party, Alicia comes face to face with the man who has the potential to ruin her perfect family life. He wouldn’t, would he? In order to keep her secrets, Alicia has to tell yet more lies, and when a devastating car accident makes the situation even more dangerous, it’s only a matter of time before everything falls apart. Can secrets really stay hidden forever?

Cassie stares at the woman on her doorstep in disbelief. Just months after losing her only son, Josh, here stands a stranger claiming to be Josh’s girlfriend. But it’s not only the woman Cassie is shocked by, it’s the baby nestled in Kim’s arms. Cassie’s grandchild. I know what you did. As Cassie tries to do what’s best for baby Samuel, she starts to receive threatening messages from someone from her past - someone Cassie has been hiding from for a long time.

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.

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.

Hannah has done everything to make sure her life is safe and secure. A long way from her unstable childhood growing up in foster care, she’s content with her sweet, little, messy apartment and her satisfying job as a social worker. She quietly worries that, aged 36, she might never fall in love. But otherwise her life is where she wants it to be. Until, encouraged by her best friend to join a dating app, she meets Alex. He’s irresistibly handsome. He loves the same music as her. The same food as well. 

Claire is shocked when she receives a message out of the blue from Sophie, a beautiful young woman who tells Claire that she’s their father’s secret child. Having spent years nursing her sweet little daughter, Ella, through a life-threatening illness whilst dealing with the emotional fall-out of a devastating marriage breakdown, Claire feels tentatively excited to meet Sophie. Perhaps she might finally have someone in the family to lean on....

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. 

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? 

Daisy and Simon’s marriage isn’t what it seems…. After years together, the arrival of longed-for daughter Millie sealed everything in place. They’re a happy little family of three. So what if Simon drinks a bit too much sometimes — Daisy’s used to it. She knows he’s just letting off steam. Until one night at a party things spiral horribly out of control. And their happy little family of three will never be the same again.

For 15 years, Lexi and Jake have played the same six numbers with their friends. Over drinks, dinner parties and summer barbecues, the three couples have discussed the important stuff — kids, marriages, careers — and they’ve laughed off their disappointment when they failed to win anything.

Rachel is afraid she may have done something terrible. She's sitting in a room, being asked whether she killed someone. She doesn't understand how her life has changed so completely. When she was younger, heads would turn when she walked into a room. Her children needed her; her husband adored her. But somehow the years wore that all away. She was so busy raising her children, looking after her parents.... 

Samantha Frayn doesn’t know why Peter Bridges picks her - a nobody with bitten fingernails and a troubled childhood behind her - but she falls quickly. He’s older, charming, likes fine wine and French films, and his beautiful home has real art on its walls. Peter transforms Samantha’s life in an instant. He sees the better version of herself - the one she’s always wanted to be. It’s only normal that there’s a little friction, when she moves in, over domestic matters like where things are kept, or the proper times to eat, sleep, and shower.

Clare is ready for a break. It's been a tough year and now she wants to put her feet up. Arriving at the Italian villa for their summer holiday, she decides it's high time her husband and his family did some of the work. After all, her husband owes her.... Now her brother-in-law Jamie has brought a wife, someone none of them have met before. Ella is everything Clare isn't. Glamorous. Young. Influential. But she knows a secret about Clare. Something that has the power to break the whole family apart.