Arriving on the windswept Ile de Ré, Tabby Dewhurst is unable to even afford a room for the night. Overhearing a villager repeating the access code to her front door, she lets herself into the house, and so she enters the strange, hidden world of Emmie, whose sudden offer of friendship is at odds with her obsession with privacy. Tabby begins to form suspicions about Emmie, suspicions that lead her to a scandal with shattering consequences.

When Fiona Lawson comes home to find strangers moving into her house, she's sure there's been a mistake. She and her estranged husband, Bram, have a modern coparenting arrangement: bird's nest custody, where each parent spends a few nights a week with their two sons at the prized family home to maintain stability for their children. But the system built to protect their family ends up putting them in terrible jeopardy. In a domino effect of crimes and misdemeanors, the nest comes tumbling down.

Celebrating her forty-fifth birthday at her local pub, popular podcaster Alix Summer crosses paths with an unassuming woman called Josie Fair. Josie, it turns out, is also celebrating her forty-fifth birthday. They are, in fact, birthday twins. A few days later, Alix and Josie bump into each other again, this time outside Alix’s children’s school. Josie has been listening to Alix’s podcasts and thinks she might be an interesting subject for her series. She is, she tells Alix, on the cusp of great changes in her life.

It should have been just a mid-life fling. A guilty indiscretion that Neve Connolly could have weathered. An escape from 20 years of routine marriage to her overworked husband, and from her increasingly distant children. But when Neve pays a morning-after visit to her lover, Saul, and finds him brutally murdered, their pied-à-terre still heady with her perfume, all the lies she has so painstakingly stitched together threaten to unravel.

Early one morning on the shore of the Thames, DCI Samuel Owusu is called to the scene of a gruesome discovery. When Owusu sends the evidence for examination, he learns the bones are connected to a cold case that left three people dead on the kitchen floor in a Chelsea mansion thirty years ago. Rachel Rimmer has also received a shock—her husband, Michael, has been found dead in the cellar of his house in France. All signs point to an intruder, and the French police need her to come urgently to answer questions about Michael and his past that she very much doesn’t want to answer.

Welcome to Stanhope. A safe neighborhood. A place for families. William Wooler is a family man, on the surface. But he’s been having an affair, an affair that ended horribly this afternoon at a motel up the road. So when he returns to his house, devastated and angry, to find his difficult nine-year-old daughter, Avery, unexpectedly home from school, William loses his temper. Hours later, Avery’s family declares her missing. Suddenly Stanhope doesn’t feel so safe. And William isn’t the only one on his street who’s hiding a lie.

After years of avoiding each other, Daisy Darker’s entire family is assembling for Nana’s 80th birthday party in Nana’s crumbling gothic house on a tiny tidal island. Finally back together one last time, when the tide comes in, they will be cut off from the rest of the world for eight hours. The family arrives, each of them harboring secrets. Then at the stroke of midnight, as a storm rages, Nana is found dead. And an hour later, the next family member follows…

Bestselling mystery writer Lucy Harper's talent for invention has given her fame, fortune, and an army of adoring readers. It has also saddled her with dependents, namely her fawning husband Dan. When Dan suddenly goes missing, his disappearance evokes dark memories that take Lucy back more than thirty years—to the day her brother vanished without a trace. That's when Lucy began conjuring stories. The police investigation revealed few confirmed details, so she created tales to fill in the gaps, to explain what happened that day her brother disappeared—and Lucy was the only witness.

Stephen Aston is getting married again. The only problem is, he's still married to his first wife, even though she is in a care facility for dementia. But he'll take care of that easily, by divorcing her—even if his adult daughters protest. Tully and Rachel Aston look upon Heather as nothing but an interloper. Heather is the same age as Rachel and even younger than Tully. Clearly she's a gold digger and after their father's money. Heather has secrets that she's keeping close, and reasons of her own for wanting to marry Stephen.

Jake Hayes is missing. This much is certain. At first, his wife, Nina, thinks he is blowing off steam at a friend’s house after their heated fight the night before. But then a day goes by. Two days. Five. And Jake is still nowhere to be found. Lily Scott, Nina’s friend and coworker, thinks she may have been the last to see Jake before he went missing. After Lily confesses everything to her husband, Christian, the two decide that nobody can find out what happened leading up to Jake’s disappearance, especially not Nina.

The chaotic but happy equilibrium of the Nightingale family is thrown into disarray when Cecily - whose children can't remember her ever being remotely spontaneous - disappears to a Greek island with no warning or explanation. Her reasons for doing something so out of character are a total mystery to her three daughters, high-powered executive Felicity, unfulfilled GP Julia and organised mother-of-five Lily.

Of course, I’m not going to murder her in the night. I need my laptop back first. That’s the whole point of making friends with Emily Harper, author of the hugely successful novel Diary of an Octopus. So I could get into her apartment and take back what’s mine. Emily doesn’t know who I really am. She thinks I’m her biggest fan, her new best friend who happens to need a place to stay for a few days. She doesn’t realize the laptop she found—and took—from a busy airport almost two years ago was mine. I don’t care about the laptop, just what's on it: my diary.

London cycle courier Astrid Bell has known most of her housemates for years, but while they have a tangled history together - romantic pairings, one-night stands, friendships - they each have secrets. Astrid is on her way home one day when her neighbor accidentally knocks her off her bike. Suffering a few bruises, her roommates help her home. The next day, they learn that same neighbor was bludgeoned to death only hours after the accident.

Carol is a divorced teacher living in a small town in Ireland, her only son now grown. A second chance at love brings her unexpected connection and belonging—and sparks a flurry of speculation. What does a woman like her see in a man like that? What happened to his wife who abandoned him and his children all those years ago? Carol and Declan know their relationship is the talk of the town, but the gossip only serves to bring the couple closer.

When Roisin and Joe join their friends for a weekend at a country house, it’s a triple celebration—a birthday, an engagement, and the launch of Joe’s shiny new TV show. But as the weekend unfolds, tensions come to light in the group and Roisin begins to question her own relationship. And as they watch the first episode of Joe’s drama, she realizes that the private things she told him—which should have stayed between them—are right there on the screen.