Birdie Cousins has thrown herself into the details of her daughter Chess's lavish wedding, from the floating dance floor in her Connecticut back yard to the color of the cocktail napkins. Like any mother of a bride-to-be, she is weathering the storms of excitement and chaos, tears and joy. But Birdie, a woman who prides herself on preparing for every possibility, could never have predicted the late-night phone call from Chess, abruptly announcing that she's cancelled her engagement. It's only the first hint of what will be a summer of upheavals and revelations.

Kelley Quinn is the owner of Nantucket's Winter Street Inn and the proud father of four, all of them grown and living in varying states of disarray. Patrick, the eldest, is a hedge fund manager with a guilty conscience. Kevin, a bartender, is secretly sleeping with a French housekeeper named Isabelle. Ava, a school teacher, is finally dating the perfect guy but can't get him to commit. And Bart, the youngest and only child of Kelley's second marriage to Mitzi, has recently shocked everyone by joining the Marines.

Claire has a problem with setting limits. All her life she has taken on every responsibility, assumed every burden, granted every request. Claire wants it all—and in the eyes of her friends, she has it: a devoted husband, four beautiful children, even a successful career as an artist. So when she agrees to chair the committee for Nantucket's social event of the year, she knows she can handle it. Claire can handle anything. But when planning the gala propels her into the orbit of billionaire Lock Dixon, unexpected sparks begin to fly.

Everyone refers to the St. Cecelia as “the Saint.” If you grew up coming here, you were “a Saint.” If you came from the wrong side of the river, you were “an Ain’t.” Traci Eddings was one of those outsiders whose family wasn’t rich enough or connected enough to vacation here. But she could work here. One fateful summer she did, and married the boss’s son. Now, she’s the widowed owner of the hotel, determined to see it return to its glory days, even as staff shortages and financial troubles threaten to ruin it. Plus, her greedy and unscrupulous brother-in-law wants to make sure she fails.

Lucas knows the perfect night entails just three things: video games, wine, and pad thai. Peanuts are a must! Other people? Not so much. Why complicate things when he’s happy alone? Then one day the apartment board, a vexing trio of authority, rings his doorbell. And Lucas’s solitude takes a startling hike. They demand to see his frying pan. Someone left one next to the recycling room overnight, and instead of removing the errant object, as Lucas suggests, they insist on finding the guilty party. But their plan backfires. Colossally.

The Somerville sisters believe in love, but they’ve lost faith it will happen for them. Reggie hasn’t been home since the end of the world’s shortest engagement. When her parents decide to renew their vows, she buffs up her twinkle to help with the Christmas wedding. Unexpectedly, Toby, her first love, is back too, and the spark between them shines as brightly as ever. In the spirit of the season, will they let go of past hurts and greet the New Year together?

When Mallory Blessing's son, Link, receives deathbed instructions from his mother to call a number on a slip of paper in her desk drawer, he's not sure what to expect. But he certainly does not expect Jake McCloud to answer. It's the late spring of 2020 and Jake's wife, Ursula DeGournsey, is the frontrunner in the upcoming Presidential election. There must be a mistake, Link thinks. How do Mallory and Jake know each other?

Adrienne Dealey has spent the past six years working for hotels in exotic resort towns. This summer she has decided to make Nantucket home. Left flat broke by her ex-boyfriend, she is desperate to earn some fast money. When the desirable Thatcher Smith, owner of Nantucket's hottest restaurant, is the only one to offer her a job, she wonders if she can get by with no restaurant experience. Thatcher gives Adrienne a crash course in the business...and they share an instant attraction.

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.

Welcome to the most tumultuous summer of the 20th century. It's 1969, and for the Levin family, the times they are a-changing. Every year, the children have looked forward to spending the summer at their grandmother's historic home in downtown Nantucket. But like so much else in America, nothing is the same.

Finola, a popular LA morning-show host, is famously upbeat until she’s blindsided on live TV by the news that her husband is sleeping with a young pop sensation. While avoiding the tabloids and pretending she’s just fine, she’s crumbling inside. Zennie’s breakup is no big loss. Although the world insists she pair up, she’d rather be surfing. So agreeing to be the surrogate for her best friend is a no-brainer. Ali is used to being overlooked, but when her fiancé sends his disapproving brother to call off the wedding, it’s a new low.

Years of trying unsuccessfully to conceive a child have broken more than Angie DeSaria’s heart. Following a painful divorce, she moves back to her small Pacific Northwest hometown and takes over management of her family’s restaurant. In West End, where life rises and falls like the tides, Angie’s fortunes will drastically change yet again when she meets and befriends a troubled young woman.

Nantucket writer Madeline King couldn't have picked a worse time to have writer's block. Her deadline is looming, her bills are piling up, and inspiration is in short supply. Madeline's best friend, Grace, is hard at work transforming her garden into the envy of the island with the help of a ruggedly handsome landscape architect. Before she realizes it, Grace is on the verge of a decision that will irrevocably change her life. Could Grace's crisis be Madeline's salvation?

Michelle Sanderson may appear to be a strong, independent woman, but on the inside, she’s still the wounded girl who fled home years ago. A young army vet, Michelle returns to the quaint Blackberry Island Inn to claim her inheritance and recover from the perils of war. Instead, she finds the owner’s suite occupied by the last person she wants to see. Carly Williams and Michelle were once inseparable, until a shocking betrayal destroyed their friendship. And now Carly is implicated in the financial disaster lurking behind the inn’s cheerful veneer.

Myrna, Leonie, and Chrissy meet every Thursday to sample fine cheeses, to reminisce about their former lives as professors, and lately, to muse about murder. Decades ago, a vicious cabal of male poets contrived—quite publicly and successfully—to undermine the writing career, confidence, and health of their dear friend Fern. Now, after Fern has taken a turn for the worse, her three old friends decide that it’s finally time to strike back—in secret, of course, since Fern is far too gentle to approve of a vendetta.