When her twenty-two-year-old stepdaughter announces her engagement to her pandemic boyfriend, Sarah Danhauser is shocked. But the wheels are in motion. Headstrong Ruby has already set a date (just three months away!) and spoken to her beloved safta, Sarah’s mother Veronica, about having the wedding at the family’s beach house in Cape Cod. Sarah might be worried, but Veronica is thrilled to be bringing the family together one last time before putting the big house on the market.

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.

Jules Strauss is a Princeton senior with a full scholarship, acquaintances instead of friends, and a family she's ashamed to invite to Parents' Weekend. With the income she'll receive from donating her "pedigree" eggs, she believes she can save her father from addiction.

Addie Downs and Valerie Adler will be best friends forever. That’s what Addie believes after Valerie moves across the street when they’re both nine years old. But in their teenage years, Val is swept into the popular crowd. Flash-forward 15 years. Addie Downs lives alone in her parents’ house, caring for a troubled brother and trying to meet Prince Charming on the Internet. she opens her door to find her long-gone best friend standing there, a terrified look on her face and blood on the sleeve of her coat.

Growing up in 1950s Detroit, they live in a perfect “Dick and Jane” house, where their roles in the family are clearly defined. Jo is the tomboy, the bookish rebel with a passion to make the world more fair; Bethie is the pretty, feminine good girl, a would-be star who enjoys the power her beauty confers and dreams of a traditional life. But the truth ends up looking different from what the girls imagined. Jo and Bethie survive traumas and tragedies.

At 29, Claire is full of the joys of life - that is, until her husband leaves her on the day she gives birth to her baby. With a broken heart, a beautiful newly born and an expanding mirror image, she decides to visit her eccentric family in Dublin. There she starts to feel better. So much better, in fact, that James is in for a surprise when he decides to slither back into her life....

Hollis Shaw, creator of the popular food blog, Hungry with Hollis, is shocked when her heart surgeon husband, Matthew, is killed in a one-car accident on a snowy morning. The cracks in Hollis’s perfect life—her strained marriage and her complicated relationship with her daughter, Caroline—grow deeper. So when Hollis hears about something called a “Five-Star Weekend”—one woman organizes a trip for her best friend from each phase of her life: her teenage years, her twenties, her thirties, and midlife—she decides to host her own Five-Star Weekend on Nantucket.

The Kingsley family is American royalty, beloved for their military heroics, political service, and unmatched elegance. In 1967, after Joseph S. Kingsley, Jr. is killed in a tragic accident, his charismatic son inherits the weight of that legacy. But Joe III is a free spirit—and a little bit reckless. Despite his best intentions, he has trouble meeting the expectations of a nation, as well as those of his exacting mother, Dottie.

Fresh off a bad breakup with a longtime boyfriend, Nantucket sweetheart Lizbet Keaton is desperately seeking a second act. When she’s named the new general manager of the Hotel Nantucket, a once Gilded Age gem turned abandoned eyesore, she hopes that her local expertise and charismatic staff can win the favor of their new London billionaire owner, Xavier Darling, as well as that of Shelly Carpenter, the wildly popular Instagram tastemaker who can help put them back on the map.

At 23, Ruth Saunders headed west with her 70-year-old grandma in tow, hoping to be hired as a television writer. Four years later, she's hit the jackpot when she gets The Call: the sitcom she wrote, The Next Big Thing, has gotten the green light, and Ruthie's going to be the show-runner. But her dreams of Hollywood happiness are threatened by demanding actors, number-crunching executives, an unrequited crush on a boss, and her grandmother's impending nuptials.