Pete Riley answers the door one morning and lets in a parent's worst nightmare. On his doorstep is Miles Lambert, a stranger who breaks the devastating news that Pete's son, Theo, isn't actually his son - he is the Lamberts', switched at birth by an understaffed hospital while their real son was sent home with Miles and his wife, Lucy. For Pete, his partner Maddie, and the little boy they've been raising for the past two years, life will never be the same again.

Abbie awakens in a daze with no memory of who she is or how she landed in this unsettling condition. The man by her side claims to be her husband. He’s a titan of the tech world, the founder of one of Silicon Valley’s most innovative start-ups. He tells Abbie that she is the perfect wife. He says she had a terrible accident five years ago and that, through a huge technological breakthrough, she has been brought back from the abyss. But as Abbie pieces together memories of her marriage, she begins to question her husband’s motives - and his version of events.

A struggling actor, a Brit in America without a green card, Claire needs work and money to survive. Then she gets both. But nothing like she expected. Claire agrees to become a decoy for a firm of divorce lawyers. Hired to entrap straying husbands, she must catch them on tape with their seductive propositions. Then the game changes. When the wife of one of Claire’s targets is violently murdered, the cops are sure the husband is to blame. Desperate to catch him before he kills again, they enlist Claire to lure him into a confession.

When Amy Gibson's mother is brutally murdered by her boyfriend, Amy's world is completely undone. Overcome with grief and heartache, she withdraws from everything around her—college, her friends, her entire life. Until her estranged half-brother, Oliver, saves her, pulling her back into her life and giving her family. Giving her a home.

My handsome husband Tom. You've given me everything our beautiful son and our perfect new seaside home. I want to trust you, but I know you haven't been honest about why you really wanted to move here. I haven't been honest with you either.

Annabel, Esther, Tanya, and Chloe are best friends—or were, as children. Despite drifting apart in adulthood, shared secrets have kept them bonded for better or worse, even as their childhood dreams haven’t quite turned out as they’d hoped. Then one day they receive a wholly unexpected—but not entirely unwelcome—invitation from another old friend. Poppy Greer has invited them all to her extravagant bachelorette party: a first-class plane ticket to three days of white sand, cocktails, and relaxation on a luxe private island in the Bahamas.

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.

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.

As children, Sam and Elli were two halves of a perfect whole: gorgeous identical twins whose parents sometimes couldn’t even tell them apart. They fell asleep to the sound of each other’s breath at night, holding hands in the dark. And once Hollywood discovered them, they became B-list child TV stars, often inhabiting the same role. But as adults, their lives have splintered. After leaving acting, Elli reinvented herself as the perfect homemaker: married to a real estate lawyer, living in a house just blocks from the beach.

Iris and Gabriel have just arrived home from a make-or-break holiday. But a shock awaits them. One of their closest friends, Laure, is in their house. The atmosphere quickly becomes tense as she oversteps again and again: sleeping in their bed, wearing Iris' clothes, even rearranging the furniture. Laure has walked out on her husband—and their good friend—Pierre, over his confession of an affair and a secret child. Iris and Gabriel want to be supportive of their friends, but as Laure's mood becomes increasingly unpredictable, her presence takes its toll.