1942. Three years into the war, Pam turns down her hard-won place at Oxford University to become a codebreaker at Bletchley Park. There, she meets two young men both keen to impress her, and Pam finds herself falling hard for one of them. But as the country’s future becomes more uncertain by the day, a tragic turn of events casts doubt on her choice. Present day. Julia is struggling to juggle her career, two children and a husband increasingly jealous of her success. Her brother presents her with the perfect distraction: photos of their grandmother as a young woman at Bletchley Park.

1912. As the steamship Carpathia takes the survivors of the Titanic to New York, a woman desperately searches the decks for her baby, thrust into the arms of another passenger as a lifeboat left, and now nowhere to be found. 2022. When archivist Jackie finds a notebook containing the stories of women saved by the Carpathia amongst an auction lot, she uncovers the story of a missing baby, a mysterious silver bracelet, and a journalist determined to share the truth with the world.

1911. As Emma packs her trunk to join the ocean liner Olympic as a stewardess, she dreams of earning enough to provide a better life for both her sisters. With their photograph tucked away in her luggage, she promises to be back soon - hoping that sickly Lily will keep healthy and wild Ruby will behave. But neither life at sea nor on land is predictable, and soon the three sisters’ lives are all changed irrevocably.

When Ali inherits her great-aunt’s house, she immediately moves her whole family in, despite the warnings that there is something strange about the place. Unfazed, Ali begins redecorating, going through the rooms, making each one her own with the help of her daughter, Kelly. But when under the wallpaper in Kelly’s new room they discover a scrawled message from 1944, Ali begins to question the history of the house as she knows it.

It’s 1916 and, as war rages in Europe, Gráinne leaves her job in a department store to join Countess Markiewicz’s revolutionary efforts. It is a decision which will change her life forever. A rebellion is brewing, and as Dublin’s streets become a battleground, Gráinne soon discovers the personal cost of fighting for what you believe in. Decades on, student Nicky is recovering from a break-up when a research project leads her to her great-grandmother’s experiences in revolutionary Ireland.