On holiday with friends, young historian Briony Andrews becomes fascinated with a wartime story of a ruined villa in the hills behind Naples. Briony’s grandfather had been a British soldier during the Italian campaign of 1943 in that very area. Handed a bundle of letters that were found after the war, Briony sets off to trace the fate of their sender, Sarah Bailey. As Briony begins to uncover the story, she encounters resentments and secrets still tightly guarded.

It is Christmas 1937 when sisters Rowan and Thea travel from London to Scotland to visit their dying father. Having lost their mother in a tragic sailing accident when they were young, the two women are accustomed to grief. But they have no idea that their father's death will expose a terrible deception.... For back in London is his wife, Sophie, and their two sons. Neither family knows of the other's existence, and when news reaches Sophie of Hugh's death, her whole world is turned upside down.

London, 1917. When 19-year-old Alice Copeman becomes pregnant, she is forced by her father and stepmother to give up the baby. She simply cannot be allowed to bring shame upon her family. But all Alice can think about is the small, kitten-like child she gave away, and she mourns the father, a young soldier, so beloved, who will never have the chance to know his daughter. Edith and Philip Burns, a childless couple, yearn for a child of their own. When they secretly adopt a baby girl, Irene, their life together must surely be complete. 

Rosa has arrived in London from Poland to look for her younger brother, Mikhail. He is supposed to be staying with their English father, but when she visits the house she finds it's locked up, and there's no sign of either of them. Stef is running away from her boyfriend, Oliver. Frightened, friendless and far from her family, she needs somewhere to hide. All three find refuge at 11 Bellevue Gardens. Here its owner, Leonie, once herself found sanctuary and now opens her house to others in need.

A forgotten woman....1951. Esther Durrant, a young mother, is committed to an isolated mental asylum by her husband. Run by a pioneering psychiatrist, the hospital is at first Esther's prison but soon becomes her refuge. A cache of unsent love letters.... 2017. When free-spirited marine scientist Rachel Parker is forced to take shelter on a far-flung island off the Cornish Coast during a research posting, she discovers a collection of hidden love letters. Captivated by their passion and tenderness, Rachel is determined to find the intended recipient.