Liverpool, 1855. Ada Houston is alone. Her grandfather has recently passed away, and her brother is missing, last seen working on the Liverpool docks. Everyone assumes him to be dead. But she will not give up hope. Ada's determined search takes her to the Crimea, where she joins the team of Florence Nightingale's nurses. She may have set off looking for her brother, but along the way Ada finds friends, romance and a new purpose in her own life in the most troubling and difficult of places.

England, 1941. After three nights of relentless bombing from German aircraft, trained nurse Jo Brooks is told to report to the basement theater of Mill Road Hospital. She goes with a heavy heart, not wanting to leave behind her best friend Moira, who is desperately soothing new mothers on the maternity ward. As Jo arrives safely underground, the ward takes a direct hit.

In the slums of 1880s New York, Una Kelly has grown up to be a rough-and-tumble grifter, able to filch a pocketbook in five seconds flat. But when another con-woman pins her for a murder she didn't commit, Una is forced to flee. Running from the police, Una lies her way into an unlikely refuge: the nursing school at Bellevue Hospital.

In 1917, after Arlene Favier’s home burns to the ground, taking her father with it, she must find a way to support her mother and younger brother. If she doesn’t succeed, they will all be impoverished. Job opportunities are scarce, but then a daring possibility arises: the American Women’s Hospital needs ambulance drivers to join a trailblazing, all-female team of doctors and nurses bound for war-torn France.

Nobody leaves Auschwitz alive. Mala, inmate 19880, understood that the moment she stepped off the cattle train into the depths of hell. Edward, inmate 531, is a camp veteran and a political prisoner. They are locked up for no other sin than simply existing. But when they meet, the dark shadow of Auschwitz is lit by a glimmer of hope. Edward makes Mala believe in the impossible. That despite being surrounded by electric wire, machine guns topping endless watchtowers and searchlights roaming the ground, they will leave this death camp.

Aleen Cust has big dreams. And no one―not her family, society, or the law―will stop her. Born in Ireland in 1868 to an aristocratic English family, Aleen knows she is destined to work with animals, even if her family is appalled by the idea of a woman pursuing a veterinary career. Going against their wishes but with the encouragement of the guardian assigned to her upon her father’s death, Aleen attends the New Veterinary College in Edinburgh, enrolling as A. I. Custance to spare her family the humiliation they fear.

Librarian Sylvia Ashe knows nothing about her past, having grown up without a father and a mother who refused to discuss him. When she stumbles upon a diary that suggests she's descended from magicians, she's skeptical. After all, magicians are special, and she's just an ordinary woman who loves books. She seeks answers from a member of the most prominent family of magicians, but she quickly learns that finding the truth won't be easy, especially when he turns out to be as artless as her, and more compelling and dangerous than books.

Orphan Kitty Pattison is young, naïve and ready to do her bit for the war effort when she volunteers with the Red Cross and pledges to help those most in need. It’s one of the most nerve-wracking moments of her life, but then she meets fellow volunteers Joan Norfolk and Trixie Dunn, and a bond of friendship is forged in the fire of life on the wards during the Blitz.

At the end of her first unsuccessful season out in society, Lady Georgiana has all but given up on attracting a suitable man - until she receives an invitation to a masked Halloween ball at Broxley Manor. Georgie is uncertain why she was invited, until she learns that the royal family intends to marry her off to a foreign prince, one reputed to be mad.

August 1914. While Europe enters a brutal conflict unlike any waged before, the Duncan household in Baltimore, Maryland, is the setting for a different struggle. Ruth and Elise Duncan long to escape the roles that society, and their controlling father, demand they play. Together, the sisters volunteer for the war effort - Ruth as a nurse, Elise as a driver.

As the war begins, Hanna Rombauer, a young German woman, is sent to live with her aunt and uncle after her mother’s death. Thrown into a life of luxury she never expected, Hanna soon finds herself unwillingly matched with an SS officer twenty years her senior. The independence that her mother lovingly fostered in her is considered highly inappropriate as the future wife of an up-and-coming officer and she is sent to a “bride school.” There, in a posh villa on the outskirts of town, Hanna is taught how to be a “proper” German wife.

Would you risk your life to save just one person? An incredible story of love, hope, and friendship; and a testament to humanity and courage in history’s darkest days. 1941, Nazi-occupied Amsterdam. Professor Josef Held has never recovered from the loss of his beloved wife - and has no intention of ever letting anyone new into his quiet, safe world. But then the Nazis come for the Jews - and Mrs Epstein is killed. And Josef, in an impulsive act of courage, offers his student Michael Blum a place to hide.

Plymouth, 1941. As sirens blare all around, the Shawbrook family take refuge in a packed shelter. Bombs have already begun to fall through the night sky when they realize their infant son, Freddie, has been forgotten in the rush, left to sleep in his crib. Terrified, Vera, his young mother, races to find him and bring him to safety. The next morning, air-raid warden David Shawbrook returns from his watch to find the shelter pulverized, and his family seemingly all dead. Dirty footprints inside their home betray the looters who have rifled through the house.

In an Ireland doubly ravaged by war and disease, Nurse Julia Power works at an understaffed hospital in the city center, where expectant mothers who have come down with the terrible new flu are quarantined together. Into Julia's regimented world step two outsiders - Doctor Kathleen Lynn, a rumored Rebel on the run from the police, and a young volunteer helper, Bridie Sweeney. In the darkness and intensity of this tiny ward, over three days, these women change each other's lives in unexpected ways.

In Nazi-occupied Poland, Sofia cannot look her father in the eye. Sofia’s mother, her papa’s cherished wife, is Jewish—how dare he work as a doctor for the SS? She cannot forgive him, even if the bargain was made to spare their lives. In the middle of the night, Isaac emerges from a packed train with hundreds of others. Beneath Auschwitz’s barbed wire, the SS decide prisoners’ fates on the spot—and Isaac is chosen to work. Every breath feels like it could be Isaac’s last, so when he sees a beautiful auburn-haired girl peering out of the farm window, it feels like a dream.