England, 1959: Laurel Nicolson is 16 years old, dreaming alone in her childhood tree house during a family celebration at their home, Green Acres Farm. She spies a stranger coming up the long road to the farm and then observes her mother, Dorothy, speaking to him. And then she witnesses a crime.

Edie Burchill and her mother have never been close, but when a long lost letter arrives one Sunday afternoon with the return address of Milderhurst Castle, Kent, printed on its envelope, Edie begins to suspect that her mother’s emotional distance masks an old secret.

1913: In a sprawling manor on the outskirts of London, three young women seek to fulfill their destinies and desires amidst the unspoken rules of society and the distant rumblings of war.... Sir Philip Buxton raised three girls into beautiful and capable young women in a bohemian household that defied Edwardian tradition. Eldest sister Rowena was taught to value people, not wealth or status. But everything she believes will be tested when Sir Philip dies, and the girls must live under their uncle’s guardianship....

Dolly Lane is a dreamer, a downtrodden maid who longs to dance on the London stage, but her life has been fractured by the Great War. Memories of the soldier she loved, of secret shame and profound loss, by turns pull her back and spur her on to make a better life. When she finds employment as a chambermaid at London's grandest hotel, The Savoy, Dolly takes a step closer to the glittering lives of the Bright Young Things who thrive on champagne, jazz, and rebellion.

In fear for their lives after the sudden death of their mother, Adéla and Klára must flee Prague to find refuge with their uncle in Australia. Later, Adéla becomes a film director at a time when the local industry is starting to feel the competition from Hollywood. But even while success is imminent, the issues of family and an impossible love are never far away.

It's 1945: When the critically wounded Captain Cooper Ravenal is brought to a private hospital on Manhattan's Upper East Side, young Dr. Kate Schuyler is drawn into a complex mystery that connects three generations of women in her family to a single extraordinary room in a Gilded Age mansion. Who is the woman in Captain Ravenel's portrait miniature who looks so much like Kate? And why is she wearing the ruby pendant handed down to Kate by her mother?

London, 1955: Grace Monroe is a fortunate young woman. Despite her sheltered upbringing in Oxford, her recent marriage has thrust her into the heart of London's most refined and ambitious social circles. Then one evening a letter arrives from France that will change everything. Grace has received an inheritance. There's only one problem: she has never heard of her benefactor, the mysterious Eva d'Orsey. Told by invoking the three distinctive perfumes she inspired, Eva d'Orsey's story weaves through the decades, from 1920s New York to Monte Carlo, Paris, and London.

1938: She was one of the six sparkling Mitford sisters, known for her stinging quips, stylish dress, and bright green eyes. But Nancy Mitford’s seemingly dazzling life was really one of turmoil: with a perpetually unfaithful and broke husband, two Nazi sympathizer sisters, and her hopes of motherhood dashed forever. With war imminent, Nancy finds respite by taking a job at the Heywood Hill Bookshop in Mayfair, hoping to make ends meet, and discovers a new life.

Clarissa is almost 17 when the spell of her childhood is broken. It is 1914, the beginning of a blissful, golden summer - and the end of an era. Deyning Park is in its heyday, the large country house filled with the laughter and excitement of privileged youth preparing for a weekend party. When Clarissa meets Tom Cuthbert, home from university and staying with his mother, the housekeeper, she is dazzled.

Eight months since losing her mother in the Spanish flu outbreak of 1919, 21-year-old Lillian Carter's life has completely fallen apart. For the past six years, under the moniker Angelica, Lillian was one of the most sought-after artists' models in New York City, with statues based on her figure gracing landmarks from the Plaza Hotel to the Brooklyn Bridge

Cornwall, 1940. Back in England after the harrowing evacuation at Dunkirk, WWII Red Cross nurse Anna Trenowyth is shocked to learn her adoptive parents, Graham and Prue Handley, have been killed in an air raid. She desperately needs their advice, as she's been assigned to the military hospital that has set up camp inside her biological mother's childhood home - Nanreath Hall. Anna was just six years old when her mother, Lady Katherine Trenowyth, died. All she has left are vague memories that tease her with clues she can't unravel.

A long-forgotten secret, a scandalous attraction and a place where two women's lives are changed forever. 1926: Violet Armstrong is one of the few remaining members of staff working at the grand Evergreen Spa Hotel as it closes down over winter. Only a handful of guests are left, including the heir to a rich grazing family, his sister and her suave suitor. When a snowstorm moves in, the hotel is cut off and they are all trapped. No-one could have predicted what would unfold.

When the Duke of Lexington meets the mysterious Baroness von Seidlitz-Hardenberg on a transatlantic liner, he is fascinated. She’s exactly what he’s been searching for - a beautiful woman who interests and entices him. He falls hard and fast - and soon proposes marriage. And then she disappears without a trace.… For in reality, the "baroness" is Venetia Easterbrook - a proper young widow who had her own vengeful reasons for instigating an affair with the duke. But the plan has backfired. Venetia has fallen in love with the man she despised - and there’s no telling what might happen when she is finally unmasked….

England, 1921. Three years after her husband, Alex, disappeared, shot down over Germany, Jo Manders still mourns his loss. Working as a paid companion to Alex's wealthy, condescending aunt, Dottie Forsyth, Jo travels to Wych Elm House, the family's estate in the Sussex countryside. But there is much she never knew about her husband's origins...and the revelation of a mysterious death in the Forsyths' past is just the beginning.

On any particular day, thousands upon thousands of people pass through New York City's Grand Central Terminal, through the whispering gallery, beneath the ceiling of stars, and past the information booth and its beckoning four-faced clock, to whatever destination is calling them. It is a place where people come to say hello and good-bye. And each person has a story to tell.