It’s a beautiful day for a wedding. White roses scent the air and the summer sunlight streams in. A spoon chimes against a champagne flute and the room falls silent. And there he is - my husband - getting to his feet to propose a toast. He’s still handsome. His new wife is next to him, gazing upwards, oblivious. I’m not supposed to be here. All these years in the same town and I had no idea until I saw his name on the seating plan. He lived with me, once. Loved me. Small-town memories are long, but the people in this room don’t want to remember.

Ruth has spent every day of the last 15 years wondering why her daughter Isobel left. Walking around the school to which she has given her life, every child she sees reminds her of her family’s bright future, which vanished in an instant. So when Ruth opens the door to find Isobel and a teenage grandson she never knew existed, she feels a rush of relief. Despite the years of hurt she never stopped loving Isobel and wants to help rebuild her life. Enrolling her grandson at the school, Ruth wants to make sure they stay for good.

It’s a warm, early summer’s evening, when Mia’s doorbell rings unexpectedly. She opens the door to see the silhouette of a teenage girl, standing in the shadow beyond the porch light - and in an instant, she realizes who it is. Daisy, the daughter she gave up as a baby. She says she has a terrible secret. And she believes the only person who can help her is Mia. Her birth mother. Mia, however, has secrets of her own. Ones that she is afraid to let Daisy or anyone else know.

Ali turned towards the cottage, anger flooding through her. She’d believed she and Meg were friends; that they’d bonded over a vision of motherhood...a world where your baby deserved everything you could give it. She’d pulled Meg’s words - Meg’s life - around her, like a comfort blanket. But that shared vision had never existed. And Ali was alone now, with nothing to protect her.

When the call finally comes, my life as I know it is over—my job as a teacher, my marriage, my family are all gone. In a heartbeat, I’ve lost everything that ever mattered to me. All because of one secret and what someone thinks she saw....

In one split second, Aidan Whelan’s perfect world is changed forever when his wife, Rowan, and three-year-old daughter Milly are involved in tragic accident. Helena O’Herlihy and her husband, James, have been struggling in their marriage, but a knock on the door telling her that James has been involved in a car crash has Helena rushing to his side. When Aidan and Helena bump into each other at Dublin City Hospital, they soon begin to wonder if it’s more than just coincidence that brought them there.

Anna works two jobs to get herself through college and never, ever talks about her family. It’s easier to keep her distance from everyone until she can finally leave her old life behind. That is, until chance throws her together with Gabe....

Stella follows her handsome husband Rob to the beautifully laid-out table in the restaurant he’s chosen specially for her 40th birthday lunch. Stella knows how they must look to anyone watching. Two people very much in love, with the perfect marriage and the perfect life. But Rob is about to drop a bombshell on Stella. He wants a divorce. If she doesn’t agree to his plan - to sell the house, divide the money, and award him full custody of 14-year-old Georgie - he will tell their innocent daughter the one secret he promised to keep.

When I found out I was pregnant, I couldn’t have been happier. Ever since my own father died, I’d felt utterly lost. But you changed everything. Finally, I had found my purpose: to be the best mother I could be. But I couldn’t–wouldn’t–tell anyone who your father was. I could never forget the look in his eyes that day. The betrayal written across his face. All the things we didn’t say and the secret that tore us apart.

When Hannah met David, it was love at first sight. They were married quickly, but she knew it was the right choice. They're always laughing, the passion is unmatched, and they want the same things. Most of all, they both want a family. For David, it's doubly important. He tragically lost his first wife, Katherine, several years before. Hannah is, he says, the person who saved him from his grief. Although his friends worried he was moving on too fast, and Hannah sometimes still feels a strange jealousy towards his first wife, deep down she knows she's meant to be his happily-ever-after.

I didn’t plan to fall pregnant, but when I found out, I was overjoyed. Even though I’d be going it alone, I swore I’d give my baby everything they needed. But I didn’t know who the man I met on that sweltering summer night, the father of my child, really was. I decided to keep his secret to protect the innocent…but then my beautiful baby was born with a rare illness, desperately needing a transplant.

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.

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.

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.

When Madeline's six-year-old daughter Tilly collapses one Sunday night, Madeline’s world is turned upside down. Racing to the hospital, she imagines the worst scenarios in her mind, but when they arrive the doctors say that Tilly is fine. Madeline’s ex-husband Adam and her best friend Laura think Madeline is being overprotective, that Tilly fainted because of her fussy eating. But Madeline is sure something is seriously wrong with Tilly. She can feel it. And she believes that a mother’s instinct is never wrong.