Flossy Merrill has managed to—somewhat begrudgingly—gather her three ungrateful grown children from their dysfunctional lives for a summer reunion at the family’s Rhode Island beach house. Clementine, her youngest child and a young mother of two small children, has caused Flossy the most worry after enduring a tragically life-altering year. But Samuel and his partner Evan are not far behind in their ability to alarm: their prospective adoption search has just taken a heart-wrenching turn.

Eddie Grant is happy with her life and her work as a personal assistant to Dinah Lavender, one of the most famous and renowned romance authors in the business. But being a spectator to notoriety and glamour isn’t as fulfilling as she once thought. Thankfully, Eddie has the perfect excuse for a vacation: Her hardworking younger sister, Barrett, is opening her gift shop on Memorial Day weekend, and could use all the help she can get. But going home to the beautiful island of Nantucket means facing the family’s difficult past.

The historic houses in the seaside town of Beaufort, North Carolina, have held the secrets of their inhabitants for centuries. One of the most enduring refuses to be washed away by the tide: What happened to Rebecca and Townsend Saint James on that fateful night of their disappearance in 1976? Now, the granddaughter they never knew, Keaton Smith, is desperate for a fresh start. So when her mother needs someone to put her childhood home in Beaufort on the market, she jumps at the chance to head south.

They were just friends. Best friends. They spent entire summers sitting on Shiloh’s porch steps, dreaming about the future. They promised each other that, no matter what, their friendship would never change. Well, Shiloh did go to college, and Cary did join the Navy. And yet, somehow, everything changed.

At age ninety-two, Tish Darling is the matriarch and protector of what’s left of the Darling family fortune, including the decades-old beach house, Riptide. Located on the crook of Cape Cod, it’s a place she once loved but has not returned to in decades, since a tragic family accident one perfect summer day. Still, she is determined to keep Riptide in the family. Even if that means going back there on the cusp of her granddaughter’s wedding. Even if it means revealing someone else’s truth.