Lark Smith has always had a plan for her life: find a fantastic guy, create a marriage as blissful as her parents’, pop out a couple of kids, and build a rewarding career as an oncologist. Things aren’t going so well. For one, the guy didn’t work out. Theoretically, she’d love to find someone else, but it hasn’t happened. Two, she’s just been transferred out of Oncology for being too emotional. (Is it her fault she’s a weeper?) Three, her parents just split up. Deviating from the plan was … well, not in the plan. A potential solution comes from the foul-tempered surgeon Lorenzo Santini.

Joshua and Lauren are the perfect couple. Newly married, they're wildly in love, each on a successful and rewarding career path. Then Lauren is diagnosed with a terminal illness. As Lauren's disease progresses, Joshua struggles to make the most of the time he has left with his wife and to come to terms with his future - a future without the only woman he's ever loved. He's so consumed with finding a way to avoid the inevitable ending that he never imagines his life after Lauren. But Lauren has a plan to keep her husband moving forward. A plan hidden in the letters she leaves him.

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.

Heather Willette has a good life in Concord, Massachusetts—complete with a husband who runs his own business and a son to take up his mantle one day. But now that her marriage has fizzled out and Ross, her only child, is graduating from college and getting serious with his girlfriend, Heather wonders if that life is the one she really wants. Ready to seek out her own happiness and discover herself again, Heather decides to leave her husband and rent a cottage on Nantucket.

Heather is happy . . . ish. She has a successful business, a cute but contemptuous cat, and best friends Daphne and Tori who know where she’s broken and love her anyway. So why does she feel crushed when her ex gets serious about someone new? No problem, she has a plan. More connections will hold her together while her world falls apart, so she finally reaches out to the stranger who might be her dad.

A new beginning in charming Oceanside, Washington, is exactly what Hope Godwin needs after the death of her twin brother. There are plenty of distractions, like her cozy cottage with the slightly nosy landlords next door, and a brewing drama among her students at the local high school. Even having settled quickly into the community, Hope still feels something is still missing. That is, until her landlords convince her to volunteer at their animal shelter. There she meets Shadow, a rescue dog that everyone has given up on. But true to her name, Hope believes he’s worth saving.

Adele and Justine have never been close. Born 20 years apart, Justine was already an adult when Addie was born. The sisters love each other, but they don’t really know each other. When Addie dropped out of university to care for their ailing parents, Justine, a successful lawyer, covered the expenses. It was the best arrangement at the time, but now that their parents are gone, the future has changed dramatically for both women.

When fate brings three strangers to a charming space for lease on the California coast, the Boardwalk Bookshop is born. Part bookstore, part gift shop, part bakery, it's a dream come true for Bree, Mikki and Ashley. But while their business is thriving, their personal lives are…not. Bree, wounded by brilliant but cold parents and her late husband's ultimate betrayal, has sworn to protect her heart at all costs. Even from Ashley's brother, a writer and adventurer who has inspired millions.

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.

Every summer the Newton family retreats to their beloved home on Nantucket for three months of sunshine, cookouts, and bonfires on the beach. But this summer will not be like any other. When Arch Newton, a prominent New York attorney, dies in a plane crash on his way home from a business trip, his beautiful widow, Beth, can barely keep things together. Above all, though, she decides that she must continue the family tradition of going to Nantucket, and at the same time fulfill a promise that Arch made before he died.