Louisa has come to her parents’ house in Maine this summer with her three kids, a barely written book that has a looming deadline, and a trunkful of resentment. Louisa is hoping the crisp breeze will blow away her irritation for her life choices and replace it with enthusiasm for both her family and her writing. But all isn’t well in Maine. Louisa’s father, a retired judge and pillar of the community, is suffering from Alzheimer’s. Louisa’s mother is alternately pretending everything is fine and not pretending at all.

When 12-year-olds Kat Steiner and Blake O’Neill meet at Camp Chickawah, they have an instant connection. But everything falls apart when they learn they’re not just best friends—they’re also half sisters. Confused and betrayed, the girls break off all contact. Fifteen years later, when their father dies suddenly, Kat and Blake discover he’s left them a joint inheritance: the family beach house in Destin, Florida. The two sisters are immediately at odds. Blake wants to sell the house, while Kat is desperate to hold on to the place where she lived so many happy memories. 

In 2013, 23-year old Molly Diamond is a barista, dreaming of becoming a writer. One night at a concert in East Williamsburg, she locks eyes with the lead singer, Jake Danner, and can’t look away. Molly and Jake fall quickly and deeply in love, especially after he writes a hit song about her that puts his band on the map.

The Pavlin family built an empire on love. As the first jewelers to sell diamond rings exclusively for proposals, they started a tradition that has defined engagements ever since. But when an ill-fated publicity stunt pits the three Pavlin sisters against one another for a famous family jewel, their bond is broken. No ordinary diamond ring, the Electric Rose splinters the sisters, leaving one unlucky in love, one escaping to the shores of Cape Cod, and the other, ultimately, dead. Now, over a decade later, Gemma Maybrook is still reconciling the reality of her mother's death.

Bridget and Will have the kind of relationship that people envy: They’re loving, compatible, and completely devoted to each other. The fact that they’re strictly friends seems to get lost on nearly everyone. For three decades, they’ve nurtured their baby, the Forsyth Trio - a chamber group they created as students with their Juilliard classmate Gavin Glantz. In the intervening years, Gavin has gone on to become one of the classical music world’s reigning stars, while Bridget and Will have learned to embrace the warm reviews and smaller venues that accompany modest success.

When her sister is found dead in a Baltimore hotel room, reporter Val Ritter’s world is turned upside down. An empty pill bottle at the scene leads the police to believe the cause of death is suicide. With little more than her own conviction, Val teams up with Terry Martin, a retired detective who has his own personal interest in the case, to prove that something more sinister is possible.

Shelly Means, a stay-at-home mom and disgraced former PTA president, is poised to get the one thing in life she really wants: a beach house in the Hamptons. Surely, once she has her beach house, Shelly will at last feel at peace, in control, and content. It might be a very small house, and it might be in the least-fancy part of the Hamptons, but Shelly is hell-bent on achieving this idea of paradise.

Ever since her journalist mother died on assignment, Marin has played it safe, refusing to set foot outside of Tennessee. Her wild-child younger sister, Sadie, has trotted the globe as a photographer, living off of art and adrenaline. When Sadie returns from a tough assignment abroad and looks a little worse for wear, Marin reluctantly agrees to a sisters' spa weekend on the tropical island of Saba. But her lifelong fear of travel is affirmed when Sadie misses the flight, Marin's luggage gets mixed up, and turbulence sends her hurtling into the lap of handsome stranger Lucas Tsai.

Lauren and her family—lucky bastards—have been granted the use of a spectacular brownstone, teeming with history and dizzyingly unattractive '70s wallpaper. Adding to the home’s bohemian, grungy splendor is the bar occupying the basement, a (mostly) beloved dive called The Sweet Spot. Within days of moving in, Lauren discovers that she has already made an enemy in the neighborhood by inadvertently sparking the divorce of a couple she has never actually met.

Twenty-six years after that amazing summer, Ariel, Sheila, Wyatt, and Nick reunite at the hotel where they first met. Now it’s called The Lighthouse and Nick owns the entire operation with his wife and daughter. Ariel and Wyatt, married for decades, arrive with their son, and Sheila’s back too, with her daughter by her side. Life hasn’t exactly worked out the way they had all hoped.