The novel opens with a prologue in which Evelyn Dixon recalls wandering away from her mother in a department store at age five and discovering a wall of towels arranged in a complete color spectrum. This moment of bliss ignited a lifelong passion for color and pattern, while her mother's panic during those fifteen lost minutes taught a complementary lesson: Everything you love can be lost in an instant. Just as despair can arrive without warning, so can hope.
Evelyn is a recently divorced woman nearing fifty. After a representative from the moving company her ex-husband Rob Dixon hired arrives to schedule the move out of their Texas home, Evelyn impulsively drives northeast, telling her son Garrett, a computer programmer in Seattle, that she is going to see the New England fall colors. She ends up in the village of New Bern, Connecticut, which strikes her as completely authentic. Walking through a cobblestone alley marked "Cobbled Court," she discovers a large, abandoned brick building. Despite its terrible condition, she envisions it as a quilt shop, though a local real estate agent warns that New Bern cannot support such a business.
The novel also follows Abigail Burgess Wynne, the wealthiest woman in New Bern. At her sixty-second birthday party, she overhears her tennis partner telling Margot Matthews, a recently unemployed marketing professional from New York who has moved to New Bern full-time after being downsized, that Abigail never lets anyone close. Her controlled life is disrupted when her attorney, Franklin Spaulding, calls to say that Liza Burgess, Abigail's nineteen-year-old niece and only living relative, has been arrested for shoplifting. A judge releases Liza into Abigail's custody for thirteen months; any trouble will send Liza to jail. Abigail, who has not seen Liza since infancy, is furious. She has deliberately kept her distance from her late sister Susan's family.
In New Bern, Evelyn endures renovation disasters while her friendship with Charlie Donnelly, the Irish owner of the Grill on the Green, deepens during morning coffee rituals. Meanwhile, Abigail and Liza settle into hostile coexistence. Franklin accuses Abigail of having paid Susan's medical bills through him but never visiting her dying sister. Abigail storms out.
Cobbled Court Quilts opens after Memorial Day with strong first-day sales, but receipts quickly shrink. Charlie challenges Evelyn to articulate her vision, and she realizes she wants not just a shop but a community. She decides to host a Quilt Pink event, a national breast-cancer quilting fundraiser. A newspaper story generates a flood of interest, and the women who sign up insist Evelyn schedule her overdue mammogram. After testing, her doctor diagnoses DCIS (Ductal Carcinoma In Situ), a high-grade, non-invasive breast cancer close to becoming invasive.
Evelyn receives the diagnosis the day before the event and spends the day teaching while numb with shock. After closing, she finds three latecomers: Abigail, Liza, and Margot. Liza has blackmailed Abigail into attending by threatening to get a large tattoo unless Abigail sews a quilt block on the anniversary of Susan's death from breast cancer. While demonstrating a stitch, Evelyn breaks down and blurts out that she has cancer. Margot takes charge, assigning Abigail to research treatments and secure specialist appointments, while she and Liza help with inventory, accounting, and marketing. The third surgeon they visit, Dr. Deanna Finney, a breast-cancer survivor herself, recommends a lumpectomy but warns that the surgery may not capture all the cancer.
Liza's artistic talents blossom at the shop, and Evelyn transforms the Friday business meetings into a quilting circle. Abigail initially resists but agrees after Evelyn asks if there is someone she would like to encourage with a handmade quilt. Abigail thinks of Bethany, a six-year-old at the women's shelter who showed Abigail around the tiny apartment she shared with her mother and baby brother. The day before Thanksgiving, Dr. Finney delivers devastating news: The lumpectomy did not fully remove the cancer, and further testing reveals the disease in both breasts. Three surgeons recommend a double mastectomy. Evelyn agrees but hides the news until Christmas Eve. On Christmas morning, Garrett announces he is quitting his corporate job to move to New Bern and help his mother.
Meanwhile, Abigail transforms: She volunteers at the shelter, attends church regularly, and tells Franklin she wants to give away nearly all of her fortune to charity. An anonymous deposit covers Margot's mounting bills, strongly implying Abigail's generosity.
In January, Liza unleashes years of rage at Abigail, accusing her of never helping her dying mother and being incapable of love, then runs into the snow. After hours of searching, Evelyn finds Liza at Susan's crypt and persuades her that Abigail has truly changed. Back home, Abigail tells Liza the truth she has never shared: Her father died penniless; she fell in love with sculptor David Collier, who pressured her into an illegal abortion that left her unable to conceive; and she discovered David in bed with her teenage sister Susan. Abigail married Woolley Wynne without love. When Susan became pregnant and refused to abort, David abandoned her. What Abigail could never forgive was Susan's courage in keeping the child, a courage she had lacked. Liza represented the real love Abigail longed for. Shaken but moved, Liza tells her aunt they must forgive each other, and they embrace.
Evelyn undergoes the double mastectomy and wakes to find her friends at her bedside. They present a surprise quilt designed by Liza, "Broken Hearts Mending," with patchwork hearts whose halves are set near but not touching, as if moving toward wholeness. Rob arrives and stays to help around the shop, but Evelyn sinks into deep depression. Mary Dell Templeton, her closest friend from Texas, flies in and shares her own losses: miscarriages, her son Howard's birth with Down syndrome, and her husband walking out. She tells Evelyn that if she could trade her life for the planned one, she would not, but she never would have known that without getting out of the rocking chair. Evelyn laughs for the first time in weeks.
After Liza's court record is expunged, she announces she is returning to art school. On the drive back from learning she will not need chemotherapy, Rob confesses that his later partner left him, he lost his job, and he came hoping to win Evelyn back. Evelyn forgives him but firmly declines reconciliation. At a surprise party that evening, she announces the shop must close. Garrett proposes building an e-commerce website and invests his savings; Margot volunteers as marketing manager; Abigail reveals she owns the building and offers rent of five dollars a month in exchange for Evelyn teaching quilting at the shelter. Rob offers fifty thousand dollars, but Evelyn declines. The business is saved.
After the party, Franklin confesses he has loved Abigail for thirty years, and they share their first kiss in the rain. Charlie, who has grown distant, accuses Evelyn of using their friendship to lure Rob back; when Evelyn tells him she turned Rob down, Charlie confesses he has been in love with her for months, and Evelyn admits she loves him too. One year later, Cobbled Court Quilts hosts an expanded Quilt Pink event. A reporter asks Evelyn for advice, and she says to cling to friends, calling friendship "the single thread that we all have running through us." Evelyn reflects that quilts are made of broken lines, just like life, and that stepping back reveals a beautiful pattern that was there all along. She walks up the street to join the people she loves.