It is past 10 o’clock on a cold Friday night when Rebecca and her husband Jack’s doorbell rings. Outside is a woman who introduces herself as Jack’s ex-girlfriend, Cara. And she’s holding the hand of a shivering, blue-eyed, four-year-old girl who she claims is Jack’s daughter. Rebecca is shocked to discover he has a child from his last relationship - even one he hadn’t known about. Because becoming parents isn’t part of their life plan.

Milly always dreamed of being a mother. Adopted herself, she has always imagined a powerful, intimate connection with a child of her own. So when she and her husband Matt are told they can’t have children, her dreams are shattered. But then their loved ones offer the ultimate gift - Milly’s best friend Anna and Matt’s brother Jack will be donors, so that Milly can finally have a chance to be a mother. Except none of the four people involved are prepared for the feelings that will threaten their most important relationships as their daughter receives a heartbreaking diagnosis.

Nathan West loved his wife Laura with all his heart. But now she’s gone, taken from him in a seemingly random act of violence. Laura was the glue that held their family together. And for Nathan, life without her feels almost meaningless. As he tries to find hope in the darkness, his three young daughters express their grief in different and challenging ways - with one set on a path of self-destruction that could devastate their family all over again. 

It’s George and Mara Spencer’s 25th wedding anniversary, and the Spencer daughters are finally back under the same roof again: Lottie, the youngest, Mara’s adored only child, and Lottie’s two older half-sisters, Dinah and Vaughan, the daughters of George’s first marriage - a marriage that ended in a terrible tragedy, with the death of his beautiful young wife. In the years since, their father has found happiness again...but on this hot summer day in Birch Bend, when catastrophe strikes at the anniversary party.

In the pretty, privileged college town of Milford, New Hampshire, everyone is friendly, and everything is safe. And on this cold autumn day, as red and yellow leaves begin to fall from the trees, and everyone wraps up for the first time, it would be easy to believe nothing bad could ever happen here. Until a screech of tires is heard, a thud, a child’s scream. The crash that sees Jenna’s six-year-old daughter, Amy Rose, being hit by a car driven by 17-year-old Maddie.

Rachel’s worst nightmare comes true when a rare auto-immune illness leaves 4-year-old daughter Emily in a coma the doctors say she may never come out of. And Rachel has to make a heartbreaking decision - one that her ex-husband, Emily’s dad James, doesn’t agree with. Terrified she’s going to lose her daughter for good, Rachel knows she must find a way to keep the hope alive for Emily. But there is only one person she can turn to for help to convince James - and it’s his new wife, Eva. 

Laura Neale is grieving. A year after her beloved husband’s death, she is still left with far too many questions and is struggling with feelings of guilt, anger, and grief. Hoping to rebuild her life and her children’s, she moves to Wychwood-on-Lea with her two troubled kids. The warm community of women who have lived in Willoughby Close welcome her with open arms, and their friendship helps Laura find a semblance of peace. But when she finds herself with an entirely unexpected attraction to her son’s teacher, James Hill, Laura is gobsmacked.

When I wake up with the sun in my eyes the morning after my daughter’s birthday party, I know something is very wrong. I go straight to her room but feel a surge of panic when I see an empty bed. Downstairs everything is totally quiet, and the front door is locked. Why didn’t I hear her scream? Who took our little girl? 

Ava’s daughter, Carly, is everything a 10-year-old should be: energetic, creative, and the light of her parent’s lives. But when she starts stumbling down stairs and walking into doors, Ava wants to rush to the doctor. Her husband, Rick, is sure she’s fretting over nothing - kids can be a little clumsy sometimes. But Ava’s instinct is telling her something is seriously wrong. Ava takes Carly to see a specialist and is given a devastating diagnosis: a rare genetic condition that will change her future forever.

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....

It’s a miracle when Katherine’s baby boy is born healthy. But his twin sister doesn’t survive, and when Katherine is told she can’t have any more children, the loss is almost too much for her to bear. Katherine always saw herself having a big family: She remembers how the loneliness of being an only child used to overwhelm her, and she is desperate to adopt a sibling for her son. But her husband, Davis, won’t agree. He worries that Katherine will struggle when the new baby arrives.

Steph has spent decades building a family with her husband, Mal, and putting their family first. She is the glue that holds them all together, and she has convinced herself that she’s been happy...most of the time. But as she stands at her birthday party watching her husband talking about a wonderful marriage she doesn’t fully recognise, the doubts that she has been pushing down for so long begin to grow.

Little Jamey, two and a half years old, is placed with experienced foster carer, Cathy Glass, as an emergency. The police and social services had no choice after a neighbour reported Jamey had been left alone all night while his mother went out partying. Scared, hungry and withdrawn, Jamey has spent so much time in his cot that his leg muscles haven’t developed, and he can barely walk. He is craving affection, and Cathy and her family find him very easy to love. However, as Jamey begins to settle in and make progress a new threat emerges. Coronavirus and lockdown change everything.

Ever since Ruby was tiny, she has been unique. Her smiles are magically rare, and she likes things done in a very particular way - her blocks are always color-coded, and her toy animals stand in regimented lines. She’s also the daughter of Sara’s dreams - even on days when being a mother to a three-year-old is exhausting. Not everyone understands Ruby like Sara does though. Not Sara’s husband Mike, and certainly not her disapproving mother-in-law, Barbara. So when circumstances force their family to move in with Barbara, Sara knows it’s going to make motherhood even harder. 

It’s the phone call every mother dreads. I’m climbing into the car after a trip to the grocery store. As the engine starts, my phone rings. It’s my stepdaughter, Shelby, who is babysitting my three-year-old Millie. "I only went upstairs for a second," she says through her sobs. "She’s gone." When the police turn up, Shelby’s story starts to unravel. What is she hiding? Then I get a message saying, "Your husband is not who you think he is." Suddenly, my family feel like strangers. Everyone has a secret - even me.