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.

On an ordinary Monday morning, Ariel Cafferty's phone buzzes with a disturbing text message. Something’s happened. I need to see you. Meet me under the candelabra tree ASAP. The words would be jarring from anyone, but the sender is the only man she ever loved. And it's been several years since she learned he died. Seeing Drew’s name pop up is heart-stopping. Ariel’s gut says it can’t be real. But she goes to the tree anyway. She has to. Nobody shows.

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.