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.

The Delaneys are fixtures in their community. The parents, Stan and Joy, are the envy of all of their friends. They’re killers on the tennis court, and off it their chemistry is palpable. But after 50 years of marriage, they’ve finally sold their famed tennis academy and are ready to start what should be the golden years of their lives. So why are Stan and Joy so miserable?

On a beautiful summer night in a charming English suburb, a young woman and her boyfriend disappear after partying at the massive country estate of a new college friend. One year later, a writer moves into a cottage on the edge of the woods that border the same estate. Known locally as the Dark Place, the dense forest is the writer’s favorite place for long walks and it’s on one such walk that she stumbles upon a mysterious note that simply reads, “DIG HERE.”

Clare and Henry have known each other since Clare was six and Henry was 36. They were married when Clare was 23 and Henry was 31. Impossible but true, because Henry is one of the first people diagnosed with Chrono-Displacement Disorder: periodically his genetic clock resets and he finds himself misplaced in time, pulled to moments of emotional gravity from his life, past and future. His disappearances are spontaneous, his experiences unpredictable, alternately harrowing and amusing.

Blythe Connor is determined that she will be the warm, comforting mother to her new baby Violet that she herself never had. But in the thick of motherhood's exhausting early days, Blythe becomes convinced that something is wrong with her daughter - she doesn't behave like most children do. Or is it all in Blythe's head? Her husband, Fox, says she's imagining things. The more Fox dismisses her fears, the more Blythe begins to question her own sanity, and the more we begin to question what Blythe is telling us about her life as well.

Before moving in with the Crouch family, Juno thought Winnie and her husband, Nigel, had the perfect marriage, the perfect son — the perfect life. Only now that she’s living in their beautiful house, she sees the cracks in the crumbling facade are too deep to ignore. Still, she isn’t one to judge. After her grim diagnosis, the retired therapist simply wants a place to live out the rest of her days in peace. But that peace is shattered the day Juno overhears a chilling conversation between Winnie and Nigel....

Six years after the fight that ended their friendship, Daphne Berg is shocked when Drue Cavanaugh walks back into her life, looking as lovely and successful as ever, with a massive favor to ask. Daphne hasn’t spoken one word to Drue in all this time - she doesn’t even hate-follow her ex-best friend on social media - so when Drue asks if she will be her maid-of-honor at the society wedding of the summer, Daphne is rightfully speechless.

When Astrid Strick witnesses a school bus accident in the center of town, it jostles loose a repressed memory from her young parenting days decades earlier. Suddenly, Astrid realizes she was not quite the parent she thought she'd been to her three, now-grown children. But to what consequence?

Daisy Shoemaker can’t sleep. With a thriving cooking business, full schedule of volunteer work, and a beautiful home in the Philadelphia suburbs, she should be content. But her teenage daughter can be a handful, her husband can be distant, her work can feel trivial, and she has lots of acquaintances, but no real friends. Still, Daisy knows she’s got it good. So why is she up all night?

On the eve of her 40th birthday, Alice’s life isn’t terrible. She likes her job, even if it isn’t exactly the one she expected. She’s happy with her apartment, her romantic status, her independence, and she adores her lifelong best friend. But her father is ailing, and it feels to her as if something is missing. When she wakes up the next morning she finds herself back in 1996, reliving her 16th birthday.

Twenty-four-year-old British painter Cleo has escaped from England to New York and is still finding her place in the sleepless city when, a few months before her student visa ends, she meets Frank. Twenty years older and a self-made success, Frank’s life is full of all the excesses Cleo’s lacks. He offers her the chance to be happy, the freedom to paint and the opportunity to apply for a green card. But their impulsive marriage irreversibly changes both their lives and the lives of those close to them, in ways they never could’ve predicted.

Edie is stumbling her way through her 20s - sharing a subpar apartment in Bushwick, clocking in and out of her admin job, making a series of inappropriate sexual choices. She is also haltingly, fitfully giving heat and air to the art that simmers inside her. And then she meets Eric, a digital archivist with a family in New Jersey, including an autopsist wife who has agreed to an open marriage - with rules.

Will and Rosie meet as teenagers. They're opposites in every way. She overthinks everything; he is her twin brother's wild and unpredictable friend. But over secret walks home and late-night phone calls, they become closer - destined to be one another's great love story. Until, one day, tragedy strikes, and their future together is shattered. But as the years roll on, Will and Rosie can't help but find their way back to each other. Time and again, they come close to rekindling what might have been.

Raised outside of Boston, Ivy’s immigrant grandmother relies on Ivy’s mild appearance for cover as she teaches her granddaughter how to pilfer items from yard sales and second-hand shops. Thieving allows Ivy to accumulate the trappings of a suburban teen - and, most importantly, to attract the attention of Gideon Speyer, the golden boy of a wealthy political family. But when Ivy’s mother discovers her trespasses, punishment is swift and Ivy is sent to China, and her dream instantly evaporates.

On a rainy October night in Kentucky, recently divorced therapist Tallie Clark is on her way home from work when she spots a man precariously standing at the edge of a bridge. Without a second thought, Tallie pulls over and jumps out of the car into the pouring rain. She convinces the man to join her for a cup of coffee, and he eventually agrees to come back to her house, where he finally shares his name: Emmett.