Marian Caldwell is a 36-year-old television producer, living her dream in New York City. With a fulfilling career and satisfying relationship, she has convinced everyone, including herself, that her life is just as she wants it to be. But one night, Marian answers a knock on the door ... only to find Kirby Rose, an 18-year-old girl with a key to a past that Marian thought she had sealed off forever. From the moment Kirby appears on her doorstep, Marian’s perfectly constructed world - and her very identity - will be shaken to its core.

It’s 2 AM on a Saturday night in the spring of 2001, and 28-year-old Cecily Gardner sits alone in a dive bar in New York’s East Village, questioning her life. Feeling lonesome and homesick for the Midwest, she wonders if she’ll ever make it as a reporter in the big city - and whether she made a terrible mistake in breaking up with her longtime boyfriend, Matthew.

First comes love. Then comes marriage. Then comes...a baby carriage? Isn’t that what all women want? Not so for Claudia Parr. And just as she gives up on finding a man who feels the same way, she meets warm, wonderful Ben. Things seem too good to be true when they fall in love and agree to buck tradition with a satisfying, child-free marriage. Then the unexpected occurs: one of them has a change of heart.

Growing up, Josie and Meredith Garland shared a loving, if sometimes contentious, relationship. Josie was impulsive, spirited, and outgoing, Meredith hardworking, thoughtful, and reserved. When tragedy strikes, their delicate bond splinters.

Ellen and Andy's first year of marriage doesn't just seem perfect, it is perfect. There is no question how deep their devotion is, and how naturally they bring out the best in each other. But one fateful afternoon, Ellen runs into Leo for the first time in eight years. Leo, the one who brought out the worst in her. Leo, the one who left her heartbroken with no explanation. Leo, the one she could never quite forget. When his reappearance ignites long-dormant emotions, Ellen begins to question whether the life she's living is the one she's meant to live.

Rachel has always been a good girl--until her 30th birthday, when her best friend Darcy throws her a party. That night, after too many drinks, Rachel ends up in bed with Darcy's fiancé Dex. Rachel is horrified to discover that she has genuine feelings for Dex. She prays for fate to intervene, but when she makes a choice she discovers that the lines between right and wrong are blurry, endings aren't always neat, and you have to risk all to win true happiness.

The Kingsley family is American royalty, beloved for their military heroics, political service, and unmatched elegance. In 1967, after Joseph S. Kingsley, Jr. is killed in a tragic accident, his charismatic son inherits the weight of that legacy. But Joe III is a free spirit—and a little bit reckless. Despite his best intentions, he has trouble meeting the expectations of a nation, as well as those of his exacting mother, Dottie.

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.

Imagine that your husband wrote you a letter, to be opened after his death. Imagine, too, that the letter contains his deepest, darkest secret - something with the potential to destroy not just the life you built together, but the lives of others as well. Imagine, then, that you stumble across that letter while your husband is still very much alive....

Lily hasn’t always had it easy, but that’s never stopped her from working hard for the life she wants. She’s come a long way from the small town where she grew up—she graduated from college, moved to Boston, and started her own business. And when she feels a spark with a gorgeous neurosurgeon named Ryle Kincaid, everything in Lily’s life seems too good to be true.

Fallon meets Ben, an aspiring novelist, the day before her scheduled cross-country move. Their untimely attraction leads them to spend Fallon's last day in LA together, and her eventful life becomes the creative inspiration Ben has always sought for his novel. Over time and amidst the various relationships and tribulations of their own separate lives, they continue to meet on the same date every year.

Harriet and Wyn have been the perfect couple since they met in college—they go together like salt and pepper, honey and tea, lobster and rolls. Except, now—for reasons they’re still not discussing—they don’t. They broke up five months ago. And still haven’t told their best friends.

Fresh off a bad breakup with a longtime boyfriend, Nantucket sweetheart Lizbet Keaton is desperately seeking a second act. When she’s named the new general manager of the Hotel Nantucket, a once Gilded Age gem turned abandoned eyesore, she hopes that her local expertise and charismatic staff can win the favor of their new London billionaire owner, Xavier Darling, as well as that of Shelly Carpenter, the wildly popular Instagram tastemaker who can help put them back on the map.

Rachel Blum and Andy Landis are eight years old when they meet late one night in an ER waiting room. Born with a congenital heart defect, Rachel is a veteran of hospitals, and she's intrigued by the boy who shows up all alone with a broken arm. He tells her his name. She tells him a story. After Andy's taken back to the emergency room and Rachel's sent back to her bed, they think they'll never see each other again.

Daisy Shoemaker can’t sleep. With a thriving cooking business, full schedule of volunteer work, and a beautiful home in the Philadelphia suburbs, she should be content. But her teenage daughter can be a handful, her husband can be distant, her work can feel trivial, and she has lots of acquaintances, but no real friends. Still, Daisy knows she’s got it good. So why is she up all night?

Marian Caldwell is a 36-year-old television producer, living her dream in New York City. With a fulfilling career and satisfying relationship, she has convinced everyone, including herself, that her life is just as she wants it to be. But one night, Marian answers a knock on the door ... only to find Kirby Rose, an 18-year-old girl with a key to a past that Marian thought she had sealed off forever. From the moment Kirby appears on her doorstep, Marian’s perfectly constructed world - and her very identity - will be shaken to its core.

Thirty-three-year-old Shea Rigsby has spent her entire life in Walker, Texas - a small college town that lives and dies by football, a passion she unabashedly shares. Raised alongside her best friend, Lucy, the daughter of Walker’s legendary head coach, Clive Carr, Shea was too devoted to her hometown team to leave. Instead she stayed in Walker for college, even taking a job in the university athletic department after graduation, where she has remained for more than a decade.

Growing up, Josie and Meredith Garland shared a loving, if sometimes contentious, relationship. Josie was impulsive, spirited, and outgoing, Meredith hardworking, thoughtful, and reserved. When tragedy strikes, their delicate bond splinters.

It’s 2 AM on a Saturday night in the spring of 2001, and 28-year-old Cecily Gardner sits alone in a dive bar in New York’s East Village, questioning her life. Feeling lonesome and homesick for the Midwest, she wonders if she’ll ever make it as a reporter in the big city - and whether she made a terrible mistake in breaking up with her longtime boyfriend, Matthew.

The Kingsley family is American royalty, beloved for their military heroics, political service, and unmatched elegance. In 1967, after Joseph S. Kingsley, Jr. is killed in a tragic accident, his charismatic son inherits the weight of that legacy. But Joe III is a free spirit—and a little bit reckless. Despite his best intentions, he has trouble meeting the expectations of a nation, as well as those of his exacting mother, Dottie.

Rachel has always been a good girl--until her 30th birthday, when her best friend Darcy throws her a party. That night, after too many drinks, Rachel ends up in bed with Darcy's fiancé Dex. Rachel is horrified to discover that she has genuine feelings for Dex. She prays for fate to intervene, but when she makes a choice she discovers that the lines between right and wrong are blurry, endings aren't always neat, and you have to risk all to win true happiness.

Ellen and Andy's first year of marriage doesn't just seem perfect, it is perfect. There is no question how deep their devotion is, and how naturally they bring out the best in each other. But one fateful afternoon, Ellen runs into Leo for the first time in eight years. Leo, the one who brought out the worst in her. Leo, the one who left her heartbroken with no explanation. Leo, the one she could never quite forget. When his reappearance ignites long-dormant emotions, Ellen begins to question whether the life she's living is the one she's meant to live.

Nina Browning is living the good life after marrying into Nashville's elite. More recently, her husband made a fortune selling his tech business, and their adored son has been accepted to Princeton. Yet sometimes the middle-class small-town girl in Nina wonders if she's strayed from the person she once was. Tom Volpe is a single dad working multiple jobs while struggling to raise his headstrong daughter, Lyla. His road has been lonely, long, and hard, but he finally starts to relax after Lyla earns a scholarship to Windsor Academy, Nashville's most prestigious private school.

First comes love. Then comes marriage. Then comes...a baby carriage? Isn’t that what all women want? Not so for Claudia Parr. And just as she gives up on finding a man who feels the same way, she meets warm, wonderful Ben. Things seem too good to be true when they fall in love and agree to buck tradition with a satisfying, child-free marriage. Then the unexpected occurs: one of them has a change of heart.

Dannie Kohan lives her life by the numbers. She is nothing like her lifelong best friend - the wild, whimsical, believes-in-fate Bella. Her meticulous planning seems to have paid off after she nails the most important job interview of her career and accepts her boyfriend’s marriage proposal in one fell swoop, falling asleep completely content. But when she awakens, she’s suddenly in a different apartment, with a different ring on her finger, and beside a very different man.