Emily, a popular but bookish prep school senior, goes missing after a night out with friends. She was last seen leaving a party with Alex, a football player with a dubious reputation. But no one is talking. Now three mothers, Catherine, Leslie, and Morgan, friends turned frenemies, have their lives turned upside down as they are forced to look to their own children - and each other’s - for answers to questions they don’t want to ask.

From the outside, my marriage to Zach was perfect: a dream home, a perfect baby girl, and passionate, all-consuming love. But as I cradle my gorgeous baby, I have to accept that the husband who used to be my everything has changed. At first, it was little things: expecting me to keep to a strict schedule, picking out my clothes for me. Now, he controls every aspect of my life: from how much money I have, to when I leave the house, and who I can see. I know deep down, only one of us will make it out of this marriage alive. 

I only try on one of Nina’s pristine white dresses once. Just to see what it’s like. But she soon finds out...and by the time I realize my attic bedroom door only locks from the outside, it’s far too late. But I reassure myself: The Winchesters don’t know who I really am. They don’t know what I’m capable of....

The white-washed Italian villa is perfect. I thought it might feel odd, living in a stranger’s house for the summer, but as my husband and children swim in the infinity pool, I start to relax. And then, in the back of a wardrobe, I find something that shatters everything.... Sparkling green eyes, square jaw, lopsided smile. A young man with his arm around a beautiful woman. The picture is old and faded, but I’d recognize him anywhere. The man is my husband.

When Rachel moves into a new apartment with her young daughter, Lily, it’s with a huge sense of relief. After escaping an abusive marriage, this perfect downtown fourth-floor rental, within minutes from the lake, feels like the new beginning the two of them deserve. But soon handwritten letters begin to arrive for someone called Annie. Alex says she was just the tenant who lived there before, who moved out one day without a word. Tentatively Rachel opens the first letter, intending to return it to the sender. 

Everyone has secrets. YouTube baking sensation April Masterson knows the secret to the perfect gooey brownies. Or how to make key lime squares that will melt in your mouth. But if you keep watching her offline, you may find out some other secrets about April; secrets she’d rather you didn’t know - like where did her son go when he snuck out of the house? What was she doing with the local soccer coach behind fogged windows? And what’s buried in her backyard? 

Zoe didn't meet her daughter the way most mothers do. She finds five-year-old Maddie alone and dirty on a countryside road. Frightened for Maddie's safety, she picks her up and takes her back to her father, not knowing what she's about to step into. Because Maddie wasn't just lost; she was there to lure her serial killer dad's new victim. After escaping from the clutches of Maddie's dangerous father, she bonds with the little girl. Only Maddie knows what it was like to be at that house. And when no family members come forward to claim Maddie, Zoe decides to adopt her. 

Cassie thinks she has met the perfect man. Joel is sweet, handsome, romantic, and best of all, he’s crazy about Cassie. She thinks she’s found the guy she’ll spend the rest of her life with. Have children with. Grow old with. Yes, she knows about his perfect ex-girlfriend, Francesca. The beautiful, brilliant chef, beloved by all his friends. But she thinks Francesca is out of the picture. She thinks Francesca is gone for good. Think again, Cassie.

Lauren is thrilled to escape her old life in London for a fresh start in the countryside with her partner, Paul, and her two stepchildren. Haunted by her past, Lauren knows how lucky she is, in her dream home with her ready-made family. She also knows how much she stands to lose. But as Lauren struggles to adjust to motherhood, Paul becomes increasingly distant and as village rumours begin to swirl about the fate of the house's previous occupants, Lauren's fears grow. 

When Maggie sees the beautiful Venetian blinds moving in the Caldwells' front window, she freezes. Her favorite neighbors Cady and Josh are away, so who is in their house? The pretty young woman who answers the door tells a convincing story. She's Sarah. The house-sitter. Just here for a month. An old friend of Cady's who needed a place to stay. She's pleasant and warm, and Maggie wanders back to her house thinking she might have made a new friend. Yet she can't help but wonder why Cady never mentioned Sarah.

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....

From the outside, it seems Grace has it all. Only she knows about the cracks in her picture-perfect life...and the huge secret behind them. After all, who can she trust? Her brother, Josh, is thousands of miles away, and he and Grace have never been close—he was always their parents’ favourite. Her best friend, Coco, walked away from her years ago; their friendship irreparably fractured by the choices they’ve made. And her husband, Marcus, seems like a different man lately. Grace can’t shake the feeling that he’s hiding something.

By the time I realized the truth about Daniel, it was too late. But the truth about me? He never saw that coming.... Dr. Daniel Ashcroft was perfect: handsome, romantic, protective. I thought I was so lucky. But then I heard the rumors about his previous girlfriend, that she had vanished without a trace. That’s when I found the cameras in my apartment. I was trapped. Daniel made it clear I couldn’t leave him, not without risking everyone I loved. I had to disappear, so I arranged my own kidnapping. I should have known Daniel would never let me get away that easily.

Grace and Justin have been trying for a family for years. So when Grace finally announces that she’s pregnant, she isn’t prepared for Justin’s reaction. Why does he act so strangely? Why does he leave and never return? Two years later, while at the seaside with baby Daniel, Grace sees Justin - who is desperate to come home but can’t reveal the reason he left. However, Grace, too, is harboring a secret, one that won’t just hurt Justin - but will destroy him completely. One thing is certain: their secrets will be exposed.

Christine and Jessica cross paths working at the advertising agency Christine runs with her husband. These two women are about to uncover the dark secrets of their own traumatic pasts. But they have no idea that they are connected. The shocking truth of what happened at the wedding all those years ago, and what became of Margaret, is going to blow their lives apart in more ways than each of them could ever have imagined....