Maia D’Aplièse and her five sisters gather together at their childhood home–a fabulous, secluded castle situated on the shores of Lake Geneva–having been told that their beloved adoptive father, the elusive billionaire they call Pa Salt, has died. Each of them is handed a tantalising clue to their true heritage–a clue which takes Maia across the world to a crumbling mansion in Rio de Janeiro in Brazil . . .

Ally D'Aplièse is about to compete in one of the world's most perilous yacht races, when she hears the news of her adoptive father's sudden, mysterious death. Rushing back to meet her five sisters at their family home, she discovers that her father—an elusive billionaire affectionately known to his daughters as Pa Salt—has left each of them a tantalizing clue to their true heritage. Ally has also recently embarked on a deeply passionate love affair that will change her destiny forever. But with her life now turned upside down.

In the heyday of the British Raj, 11-year-old Anahita, from a noble but impoverished family, forms a lifelong friendship with the headstrong Princess Indira, the privileged daughter of rich Indian royalty. Becoming the princess's official companion, Anahita accompanies her friend to England just before the outbreak of the Great War. There, she meets the young Donald Astbury - reluctant heir to the magnificent, remote Astbury Estate - and his scheming mother.

Georgian mansion Wharton Park was a place of childhood solace for Julia Forrester, spending summers in the Norfolk countryside with her beloved grandfather. So after tragedy strikes, she finds herself seeking comfort at Wharton and the allure of its hothouse, once home to exotic flowers from all corners of the globe but now lying abandoned. There she meets the new owner, the charming and magnetic Kit Crawford, whose own past is shrouded in sadness and mystery.

The present: Emilie de la Martiniéres has always fought against her aristocratic background, but after the death of her glamorous, distant mother, she finds herself alone in the world and sole inheritor of her grand childhood home in the south of France. An old notebook of poems leads her in search of the mysterious and beautiful Sophia, whose tragic love affair changed the course of her family history.