To save her sister…she must rewrite the past.

London 1940: Sandbags line London’s streets in, but for Beatrice Bone, WWII feels distant and dull. It doesn’t help that she’s stuck at home while her younger sister Clemmie is away doing secret war work at a mysterious place called The Park.

Everything changes when Clemmie is killed in a fire. Plunged into grief, Beatrice treasures her sister’s last gift: an antique pocket watch, inscribed with the words memento mori: remember death. She soon realizes the watch is more than a memento when it transports her back in time, giving her the chance to save Clemmie. But changing the past causes a ripple effect, and Beatrice is faced with a devastating choice: her sister’s life, or her country’s future?

London, 1915: While her husband is off fighting in the Great War, Alice is breaking new ground as she treats wounded soldiers at Endell Street Hospital, London’s first medical center staffed entirely by female doctors. But the horrors she witnesses awaken long-buried memories of her mother’s death, and a power she spent years trying to suppress. A power she now fears has taken hold in her eldest daughter, Beatrice . . .

In her most ambitious and emotionally resonant novel yet, Emilia Hart once again conjures the power of female resilience and the ability of love to transcend time.