Irene Steele shares her idyllic life in a beautiful Iowa City Victorian house with a husband who loves her to sky-writing, sentimental extremes. But as she rings in the new year one cold and snowy night, everything she thought she knew falls to pieces with a shocking phone call: her beloved husband, away on business, has been killed in a helicopter crash. Before Irene can even process the news, she must first confront the perplexing details of her husband's death on the distant Caribbean island of St. John.

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.

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?

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.

As the owner of Twisted, Seattle’s best salons, Erica knows that the sharpest cuts come from the people we love. She’s terrified that she’s losing her teen daughter, Summer, to her “other” family. Summer disdains Erica’s career as shallow, and she's growing close to her stepmom, Allison. All it takes to blow up Allison’s happy life is one collect call. From prison. Her beloved husband, Peter, has been arrested, leaving Allison pregnant, scared and alone with a toddler, with no money for rent or, hey, food.

Finley McGowan is determined that the niece she’s raising will always feel loved and wanted. Unlike how she felt after her mom left to pursue a dream of stardom, and when the grandfather who was left to raise them abandoned her and her sister, Sloane, when they needed him most. Finley reacted to her chaotic childhood by walking the straight and narrow—nose down, work hard, follow the rules.

1990. Toby Dobbs received a big Victorian house with too many bedrooms to count as a wedding present from his father, but his marriage is over within a month. Very alone, and very lonely, Toby posts an advertisement seeking the Unexpectedly Alone to become his roommates. Fifteen years later, the wayward souls he takes in are still living with him, with no intention of leaving. 2004. Toby Dobbs has met Leah Pilgrim from across the road, and they're falling in love.

Single mom Ellen Fox couldn’t be more content - until she overhears her son saying he can’t go to his dream college because she needs him too much. If she wants him to live his best life, she has to convince him she’s living hers. So Unity Leandre, her best friend since forever, creates a list of challenges to push Ellen out of her comfort zone. Unity will complete the list, too, but not because she needs to change. What’s wrong with a 30-something widow still sleeping in her late husband’s childhood bed?

Brothers Tony, Sean, and Ned had the perfect upbringing, but now that they are grown-up, real life is starting to get in the way. Tony’s dealing with divorce and a weight problem, novelist Sean is up against a serious case of writer’s block and a shock announcement from his “perfect” new girlfriend, and their parents have a new lodger, Gervase. Why is Bernie, their mother, so keen to give this unsavory waif a home? And what is the real reason for kid brother Ned’s surprise return from his travels in Australia?

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.