Quando é chamada ao escritório de um advogado em Londres, Lily não tem ideia de que sua vida está prestes a mudar para sempre. Lá, ela fica sabendo que sua avó nasceu na Hope’s House, um lar para mães solteiras, e recebe uma caixa com pistas sobre sua verdadeira origem: uma receita e um programa de teatro, ambos escritos em italiano.

Berlin, 1943: Ava Müller is a proud supporter of the German war effort, working for Joseph Goebbels alongside her father, a high-ranking official in the Reich. With her sister Hanna, a nurse, braving bombing raids to save lives, they are a model Nazi family. Until Ava discovers her parents and Hanna are secretly working for the resistance… Returning to their country home, Ava is shocked to find her childhood friend Eliana Goldman and her family hidden in the attic.

As 1754 is drawing to a close, tensions between the French and the British on Canada’s Acadian shore are reaching a fever pitch. Seamstress Sylvie Galant and her family—French-speaking Acadians wishing to remain neutral—are caught in the middle, their land positioned between two forts flying rival flags. Amid preparations for the celebration of Noël, the talk is of unrest, coming war, and William Blackburn, the British Army Ranger raising havoc across North America’s borderlands.

For Iris, each visit to her mother in St Mabon’s Cove, Cornwall has been the same—a serene escape from the city. But today, as she breaths in the salt air on the doorstep of her beloved childhood home, a heavy weight of anticipation settles over her. Iris knows she’s adopted, but any questions about where she came from have always been shut down by her parents, who can’t bear to revisit the past. Now, Iris can’t stop thinking about what she’s read on the official paperwork: BABY GIRL, FRANCE, 1939 – the year war was declared with Nazi Germany.

When Grace, April, and Poppy join the US Army Nurse Corps, they see it as little more than an adventure, one made all the better by their first station: Pearl Harbor, Hawaii. Joined at the hip, idealistic Grace, exuberant Poppy, and brave but haunted April frolic in the sun, attending parties, flirting with the handsome soldiers, and becoming fast friends with seasoned nurse Eva. Like the Hawaiian sun, their future seems warm and bright - until the infamous morning of December 7.