When she is only six years old, Allegra Dixon’s party-loving mother leaves without so much as a goodbye. Her father, an emotionally distant military officer, is also unable—or unwilling—to care for her. Sent to live like a ghost in her grandparents’ joyless home, Allegra finds her only solace through an escape into books. Attending boarding school, life finally takes a turn when she meets a dashing young West Point cadet named Shep Williams. Soon their friendship blossoms into something more, and they fall deeply in love.

Following the unexpected death of her beloved husband, art gallery owner Samantha Thompson finds herself adrift in their Malibu beach house. Her three adult children—scattered from New York to London to Milan—are concerned for her well-being and encourage her to take a trip to Paris. Once abroad, an impulsive day trip from Paris to Biarritz leads Samantha to discover the charming medieval village of Arcangues in the Basque countryside, with its unique and iconic blue shutters and historic château.

After working as head designer for Oscar de la Renta, Eugenia Ward started her own company when she turned forty, fourteen years ago. She is now a major name in evening gowns and wedding gowns, ready-to-wear and haute couture. But with the fashion business in major downturn, she has recently suffered heavy losses, and Eugenia desperately needs new investors—and new ideas.

Devon Darcy’s reputation precedes her. As a highly sought-after portrait artist, she seems to have the ability to peer into the souls of her subjects and then capture them on canvas. But the world doesn’t know about the devastating losses she has endured, first as an orphan, then as a far-too-young widow. When entrepreneur Charles Mackenzie Taylor sees her at a New York gallery event, he is instantly haunted by her beauty and her talent. Having lost his mother when he was thirteen, and still living in the cold shadow of his late banker father’s disapproval, Charlie has given up on love.

As she approaches the milestone birthday of forty, delicate blond beauty Amanda Delanoe finds joy in running a chic contemporary art gallery in the City of Light. The only child of a French businessman and an American model, both now deceased, Amanda lives well and adores her dog, Lulu, but so far the love of her life has eluded her.

On the occasion of her daughter Valerie's wedding and her upcoming fiftieth birthday, bestselling author Halley Holbrook finds herself reflecting. Raising twins Valerie and Olivia is her proudest accomplishment. Halley has been able to give them the loving and safe home she never had, having survived a childhood so traumatic she's never talked about it with her girls. Long ago, Halley decided to live in the sunlight of the present, not the dark shadows of the past.

Nicole “Coco” Martin's destined to have it all. As the only child of doting, successful parents, she's been given every opportunity in life. Having inherited her mother’s stunning beauty and creativity, along with her father’s work ethic and diligence, she has the world at her feet. Her graduation from Columbia's fast approaching, and with it the summer job of her dreams working at a magazine. Between work, leisurely weekends at her family’s home in Southampton, and spending as much time as possible with her best friend, Sam, life couldn’t be better - until tragedy strikes.

Antonia Adams is the product of a loveless marriage between an aspiring actress and an aristocrat from a once distinguished family. As a child, she is abandoned in the abyss that yawns between them, blamed by her mother, ignored by her father, and neglected by both. Unprotected and unloved, she learns that the only way to feel safe is to hide from the dangers around her, drawing as little attention as possible to herself, to be “invisible.”

Ellen Wharton has flown into New York from London, regardless of the weather and her husband's worry. The successful interior designer is intent on seeing her lively architect mother and has an important personal appointment to keep. But despite Ellen's urging, when the storm hits, seventy-four-year-old Grace Madison refuses to leave her Tribeca apartment in the midst of the evacuation zone, and they must eventually wade through chest-high water to the police boats outside.

Kezia Cooper Hobson, recently widowed, arrives in New York from San Francisco. Determined to make a fresh start, she has just completed the sale of her Pacific Heights home, not to mention her husband's venture capital firm, and in doing so, is also freed from her responsibility as a board member of the company. Bringing with her only a few personal treasures, she is excited to move into the blank slate of a beautiful midtown penthouse, in the city that she has always loved. It is also where her two adult daughters now live.

Born to a French mother and American father, graceful Dahlia de Beaumont has been sole owner and CEO of the venerable family perfume business based in Paris since her early twenties, following the death of her parents. For twenty-five years, after losing her husband in an avalanche, her life has centered on running Lambert Perfumes and being a devoted single mother to her four children: indecisive Charles, volatile Alexa, kind-hearted business visionary Delphine, and dreamy artist Emma. Now fifty-six, she has an "arrangement" with a married man but has been questioning that relationship.

Oona Kelly Webster has much to be grateful for. A striking woman with red hair and green eyes, she has a loving family and a job she adores, editing a prestigious line of books. To celebrate their twenty-fifth wedding anniversary, she and her husband, Charles, have planned a visit to France. But then Charles drops a bombshell. He has been living a lie—hiding an affair for a year—and he is leaving Oona for a younger male lover.

Eleven years have passed since Alexa Hamilton left the South behind, fleeing the pain of her ex-husband's betrayal and the cruelty of his prominent Charleston family. Now an assistant D.A. in Manhattan, Alexa has made a name for herself as a top prosecutor while juggling her role as devoted single mom to a teenage daughter.

With wit and intelligence, Danielle Steel explores love in all its guises, taking us into the lives of three unusual but wonderfully real couples. One Day at a Time is at once moving, thought provoking, and utterly impossible to put down.

Darcy Gray is a successful influencer with her blog, The Gray Zone, trusted by more than a million followers for her integrity and taste. At forty-two, she has the life she wants in many ways. Darcy and her husband, department store magnate Charles Gray, are a power couple in Manhattan and on the international stage. Their beloved twin daughters are each enjoying their junior year abroad, Penny in Hong Kong and Zoe at the Sorbonne in Paris. To celebrate twenty years of marriage, Darcy impulsively flies to Rome to surprise Charlie, who is tending to business interests there.