Maggie and Brad are on vacation at Lake Tahoe when they meet another couple, Skye and Joe. The four hit it off so well that Maggie invites their new friends to share her beautiful lakeside rental. What she doesn’t realize is Skye and Joe aren’t just some random couple. They have been watching Maggie and Brad and have chosen them carefully.

Victoria Barnett has it all: a great career as a nurse practitioner, a handsome and loving husband, a beautiful home in the suburbs, and a plan to fill it with children. Life is perfect—or so it seems. Then she’s in a terrible accident...and everything falls apart. Now Victoria is unable to walk. She can’t feed or dress herself. She can’t even speak. She is confined to the top floor of her house with 24-hour care.

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 Kate Burke is awakened one night by a sound outside her window, her PTSD is triggered. Was it simply a deer crossing her secluded backyard? Or was it intruders? Because Kate still lives with the dreadful memories of her husband’s murder during a seemingly random home invasion two years before, she knows the answer can mean the difference between life and death. But when she discovers the unsettling ways her property has been vandalized the next day, Kate is forced to conclude the worst: someone is watching her.

My husband was not a monster. No matter what they say.... The day my husband, Michael, stepped in front of a lorry after being questioned by the police, my world fell apart. He was devoted to me and our six-year-old daughter. But they’d connected him to the disappearance of a young mother from our tiny village.

Behind closed doors I try to relax, to unwind in the huge clawfoot bath and forget about my complicated past. It’s hard being the new couple on the street when you’ve got secrets. Because the truth is, my charming husband isn’t really my husband. And I’m not Stephanie Hamlin....

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.

Newlywed Jade Westmore has finally found her forever in husband Wells, a charming, successful, and recently divorced architect—only there’s one caveat: behind the gates of their elysian estate, hidden from street view in the caretaker’s cottage … lives Wells’s first wife, Sylvie. Three years ago, the original Mrs. Westmore suffered a nervous breakdown—and hasn’t uttered a sound since. Not a physician, psychologist, or world-renown specialist has been able to elicit so much as a word from the silent woman … until now.

Amy Whey is proud of her ordinary life and the simple pleasures that come with it - teaching diving lessons, baking cookies for new neighbors, helping her best friend, Charlotte, run their local book club. But Amy’s sweet, uncomplicated life begins to unravel when the mysterious and alluring Angelica Roux arrives on her doorstep one book-club night. Something wicked has come her way - a she-devil in a pricey red sports car who seems to know the terrible truth about who she is and what she once did.

Alice and Seth are a perfect love story: the handsome doctor and his beautiful fiancée. They’re wealthy, well liked and made for each other—the envy of all their friends. Alice can’t wait for the day of their dream wedding. But when she arrives at the altar, she doesn’t recognise the man waiting to marry her. When this stranger insists he’s Seth, her husband-to-be, the entire congregation seems to agree. Even her parents try to persuade Alice to go through with the wedding.

Breezing into the tony seaside paradise of Westport, Connecticut, gorgeous thirtysomething Piper Reynard sets down roots, opening a rehab and wellness space and joining a local yacht club. When she meets Leo Drakos, a handsome, successful lawyer, the wedding ring on his finger is the only thing she doesn’t like about him. Yet as Piper well knows, no marriage is permanent.

Ainsley Greenburg is a fixer. It’s what she prides herself on. So when Ainsley realizes her marriage is at its breaking point, she makes a decision to repair it, no matter the cost. Approaching her husband to propose the arrangement is supposed to be the hard part, but Peter agrees to the salacious plan almost immediately. The rules are simple: They will each date someone new once a week. They will never discuss what happens on the dates. Soon, though, the rules are broken, turning terrible mistakes into unspeakable consequences.

Lieutenant Abby Mullen is no stranger to crisis. As the hostage negotiation instructor for the NYPD, she deals with worst-case scenarios every day. Nothing fazes her anymore. That all changes when she gets a call from Eden Fletcher, a fellow survivor of the infamous Wilcox cult. The two haven’t spoken since the night of a tragic, fiery massacre, when their paths diverged. But now Eden needs Abby’s help: someone has kidnapped her son and is demanding a $5 million ransom. As Abby throws herself into the case, she can’t help but wonder why the kidnapper has targeted Eden.

Selena Murphy is commuting home on the train when she strikes up a conversation with a beautiful stranger in the next seat. The woman introduces herself as Martha and soon confesses that she’s been stuck in an affair with her boss. Selena, in turn, confesses that she suspects her husband is sleeping with the nanny. When the train arrives at Selena’s station, the two women part ways, presumably never to meet again.

Gemma Robinson comes into Elliot’s life like a whirlwind, and they marry and settle into his home. When she asks him if her parents can come to stay for a couple of weeks, he is keen to oblige - he just doesn’t quite know what he’s signing up for. The Robinsons arrive with Gemma’s sister, Chloe, a mysterious young woman who refuses to speak or leave her room.

Simone used to be the woman that other women would use if they suspected that their partner was cheating. She would investigate, find out the truth, and if the men were guilty, exact revenge. But after things went wrong with one couple, Simone was forced to go into hiding. Simone is now Mary, a mild-mannered woman who doesn't raise her voice or get angry, meaning nobody would suspect her of being capable of the things she used to do for a living. But when she finds out that her new boyfriend is having an affair, it awakens in her the person she used to be.

Hazel and Jamie are happily married. Or so it would seem. Behind closed doors, things are far from normal. Jamie has an unhealthy obsession, and Hazel is more worried about herself than her husband. So when Millicent injects herself into their lives, with Jamie firmly in her sights, the trio end up on a path that will end in death. Everyone has secrets. Everyone has a dark side. But who is good, who is bad, and who is going to get away with murder?

When 14-year-old Brittany disappears one night, her parents are devastated, certain she has been taken. They can't bear to think about who has done this and what might be happening to their precious girl. Even worse, the police seem to see them as suspects, implying that they may have had a part in their own daughter's disappearance. Only their neighbor, Taylor, is a rock. She organizes search parties, feeds the volunteers, works night and day to help them find Brittany.

Heather is a single mom who has always done what's best for her daughter, Chloe. From birth up to the age of seventeen, Chloe has never been any trouble, until one night when she calls her mother with some shocking news. There's been an accident. And now there's a dead body. As always, Heather puts her daughter's safety before all else, but this is one time when she goes too far. Instead of calling the emergency services, Heather hides the body, saving her child from police interviews and public outcry.

Tara Logan adores her perfect little family: husband, Noah, and two children, teenager Rosie and 11-year-old Spencer. But her happiness is shattered when she wakes in her neighbour Lee Jacobs' bed, with no memory of how she got there or what happened between them. And worse - he has been stabbed to death. Convinced she didn't kill Lee, Tara flees home and stays silent, holding her breath as the investigation grips the neighbourhood.

When Freya falls for the manipulative Kane, her life changes beyond her wildest imagination. When the luxurious life she craves gradually becomes intolerable she realises escape is out of reach. Her life has changed, and so has she. She knows that when she least expects it, he will return and make good his promise to exact revenge and ensure she pays the price he felt he is owed. Can Freya ever be free? Whoever knew love could be so dangerous?

Laura is married, she has a good home, and she is due to give birth to her first child any day now. But her perfect world is shattered when her husband comes home flustered and afraid. He's made a terrible mistake. He's done a bad thing. And now the police are going to be looking for him . . . There's only one way out of this. He wants to run. But he won't go without his wife.

When Sasha receives a call from her old university friend Gabby inviting her to spend Christmas at Gabby’s remote Scottish lake house, Sasha knows she shouldn’t go. Twelve years ago, on Christmas Eve, when Sasha and her five closest friends were celebrating the festive season, something truly horrific happened that would change the course of their friendship forever. Something that meant Sasha hasn’t spoken to any of them since that night.

Jenny sits in the same seat on the same train every week, seeing familiar faces come and go. Until a chance encounter shatters her world. Sixteen years ago, Jenny survived a traumatic ordeal that left her best friend, Susie, missing and presumed dead. The world has its theories about what happened to Susie Patterson, and one of those theories points the finger at Jenny. Now she lives a quiet life, volunteering at a crisis helpline while trying to deal with her own anxiety and the true crime fans obsessed with finding her missing friend.

Rebecca and Sam are happily married and enjoying a typical Saturday night until a knock at the door changes everything. There is a woman outside, and she has something to say. Something that will change the happy couple's relationship forever. With their marriage thrown into turmoil, Rebecca no longer knows who to trust, while Sam is determined to find out who that woman was and why she came to their house. Desperate to save his marriage, Sam is willing to do anything to get the truth, even if it means breaking the law.

My fiancé brought me tea and scrambled eggs in bed that morning, and we snuggled together, talking about buying our rings, and about our perfect wedding next year. Then we headed into town. He held my hand and gazed at the ring I liked best, a smile spreading slowly over his face. Then a glass of bubbly to celebrate. I felt flushed, excited and ready for the rest of my life with the man I loved. We race to get on the train home. It screams to a halt and I run towards its open doors. Made it. I think he’s right behind me — but when I turn around, he’s gone.

My life has never been better. I have a beautiful little girl, and I am engaged to be married to the man I’ve had a crush on since I can remember. So when Nick, my handsome fiancé, announces that his sister Carla is finally coming home, it’s truly the icing on the cake. That was twelve years ago, and no one has seen her since. Everyone is ecstatic about Carla’s return. But as I spend more time with her, I can't shake the feeling that something isn't right. Her behavior is a little off, her childhood memories don't align with mine, and she's oddly evasive about her lost years.

When overwhelmed stay-at-home mom Alexis finds herself at odds with her husband after she’s charged with a DUI, she is given one chance to get her family back: complete AA and admit her faults. The problem is, she’s never had a drinking problem and has no idea what caused the blackout that led to her arrest. Still, she’s committed to working through the program, if that’s what it takes to be reunited with her two young children. But when she connects with a new friend, Farrah, she’s empowered to take a closer look at her husband’s role in her downfall.

When Heather McKinley dreamed of becoming a doctor, she imagined curing sick kids and sporting pink stethoscopes. She never anticipated the sleepless nights, grueling exams, and endless labs. And she certainly never knew that her medical school earned the nickname Dead Med thanks to the tragic history of students overdosing on illegal drugs. But Heather would never consider doing anything like that. That is, until her longtime boyfriend dumps her, she finds herself failing anatomy, and her world starts to crumble.

Juliet only wanted to see her childhood home one more time–to look at it from the street. She never intended to meet the new owners, let alone talk her way into a position as their new live-in nanny. But it's too late now to tell the truth about who she really is. Six-year-old Kitty has progressive mutism and cannot speak. Nobody knows why she keeps making silent phone calls to the police. Juliet makes it her mission to find out. As Juliet settles into the house, nostalgia for her childhood gives way to uneasiness, as troubling memories surface.