Malibu: August 1983. It’s the day of Nina Riva’s annual end-of-summer party, and anticipation is at a fever pitch. Everyone wants to be around the famous Rivas: Nina, the talented surfer and supermodel; brothers Jay and Hud, one a championship surfer, the other a renowned photographer; and their adored baby sister, Kit. Together the siblings are a source of fascination in Malibu and the world over—especially as the offspring of the legendary singer Mick Riva. The only person not looking forward to the party of the year is Nina herself.

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.

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.

On a perfect June day, Vivian Howe, author of 13 beach novels and mother of three nearly grown children, is killed in a hit-and-run car accident while jogging near her home on Nantucket. She ascends to the Beyond where she's assigned to a Person named Martha, who allows Vivi to watch what happens below for one last summer. Vivi also is granted three “nudges” to change the outcome of events on earth.

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?

After uprooting her life in the States, Irene Steele has just settled in at the villa on St. John where her husband Russ had been living a double life. But a visit from the FBI shakes her foundations, and Irene once again learns just how little she knew about the man she loved. With help from their friends, Irene and her sons set up their lives while evidence mounts that the helicopter crash that killed Russ may not have been an accident.

Breezing into the tony seaside paradise of Westport, Connecticut, gorgeous thirtysomething Piper Reynard sets down roots, opening a rehab and wellness space and joining a local yacht club. When she meets Leo Drakos, a handsome, successful lawyer, the wedding ring on his finger is the only thing she doesn’t like about him. Yet as Piper well knows, no marriage is permanent.

Lily Bishop wakes up one morning to find a good-bye note and divorce papers from her husband on the kitchen counter. Having just moved to Alabama for his job only weeks before, Lily is devastated. New to town and knowing no one, Lily finds herself in desperate need of a job and a new place to live. When Lily hears that a hair stylist is needed at small retirement community, she decides to apply.

Belle likes to think herself immune to the dizzying effects of fabulous wealth. But when her best friend, Summer, invites her on a glamorous getaway to the Mediterranean aboard her billionaire boyfriend's yacht, the only sensible answer is yes. Belle hopes the trip will be a much-needed break from her stalled acting career and uniquely humiliating waitressing job, but once she's aboard the luxurious Lion's Den, it soon becomes clear this jet-setting holiday is not as advertised.

Hollis and Matt met on Tomales Bay the summer they both turned 12, and during the summers that followed, they grew up and fell in love. One night, after an unexpected test, they fell apart. Now, 12 years later, Hollis, who seeks refuge at her uncle’s seaside cottages to ride out a storm of her own making and Matt, weighed down by obligation to his parents, both return to Tomales Bay. Forced to share another summer in the small town that brought them together, will Hollis and Matt be able to move beyond the echo of their past and into a future filled with ever after?

It's 1947. War's over, cherry-print dresses, parking above the city lights, swing dancing. Beautiful, 17-year-old Violet lives in a perfect world. Everybody loves her. In 2012, she's still beautiful, charming, and surrounded by admirers. Veronica "Ronni" Johnson, licensed practical nurse and aspiring writer, meets the captivating Violet in the assisted living facility where Violet requires no assistance, just lots of male attention. When she dies, she leaves Ronni a very generous bequest - only if Ronni completes a book about her life within one year.

Stella Boor's biological father is a nameless, faceless sperm donor. At least, that's what her parents have led her to believe. Imagine her surprise when she learns he's none other than rock legend Billy Jameson and that Billy has died and left Stella a historic inn on a sprawling farm in the mountains of Virginia. A city girl at heart, Stella can't imagine living anywhere but New York. Her first inclination is to sell the property. But the terms of Billy's will stipulate she manages the inn for three years before putting it on the market.

It’s been a minute—or five years—since Jordan Vargas last saw his college friends, and twenty-eight years since their graduation from Berkeley when their adult lives officially began. Now Jordan, Jordy, Naomi, Craig, and Marielle find themselves at the brink of a new decade, with all the responsibilities of adulthood, yet no closer to having their lives figured out. Though not for a lack of trying. Over the years they’ve reunited in Big Sur to honor a decades-old pact to throw each other living “funerals,” celebrations to remind themselves that life is worth living.

Though India Devlin left her hometown to pursue a brilliant career as a criminal prosecutor, she has always loved historic Devlin’s Light, visiting as often as her busy schedule permits. But when her brother is found murdered on the steps of the lighthouse - the town’s namesake - she returns to uncover who killed Ry. When her brother’s good friend, Nick Enright, offers to help in her investigation, India accepts - after all, he’s the one who found Ry that night, and heard his mysterious last words.

Ten years ago, Stuart Carpenter was killed in a single-car accident after retrieving his daughter, Reese, from college. The first responders to the accident saw no evidence of her, and she’s been neither seen nor heard from since. A decade later, Reese’s mother, Eva, struggling to make it through her days, holds out hope her daughter is still alive. Maggie, on the rebound after the breakup of a long-term relationship, rushes into marriage with a man she knows little about.