When the Germans march into Denmark, Baron Henrik Ahlefeldt exchanges his nobility for anonymity, assuming a new identity so he can secretly row messages for the Danish Resistance across the waters to Sweden. American physicist Dr. Else Jensen refuses to leave Copenhagen and abandon her research-her life's dream. While printing resistance newspapers, she hears stories of the movement's legendary Havmand-the merman-and wonders if the mysterious and silent shipyard worker living in the same boardinghouse has something to hide. 

New York, 1898. The only thing more shocking than Arthur Stanhope III’s unexpected death is the revelation that his will bestows his company—and most of the vast fortune that goes with it—to the nearest male heir, leaving his mother, wife, and daughter nearly impoverished. His widow, Sylvia, quickly realizes she must set aside her grief to ensure their daughter, Adelaide, is launched into society as soon as the appropriate mourning period passes.

It is 1952, and nearly all the girls 16-year-old Bertha Harding knows dream of getting married, keeping house, and raising children in the suburbs of Detroit, Michigan. Bertha dreams of baseball. She reads every story in the sports section, she plays ball with the neighborhood boys—she even writes letters to the pitcher for the Workington Sweet Peas, part of the All-American Girls Professional Baseball League.

When their father's death leaves them impoverished, Sarah Summers and her genteel sisters fear they will be forced to sell the house and separate to earn livelihoods as governesses or companions. Determined to stay together, Sarah convinces them to open their seaside home to guests to make ends meet and provide for their ailing mother. Instead of the elderly invalids they expect to receive, however, they find themselves hosting eligible gentlemen. Sarah is soon torn between a growing attraction to a mysterious Scottish widower and duty to her family.

In the summer of 1933, a man named Adolf Hitler is the new and powerful anti-Semitic chancellor of Germany. But in Los Angeles, no-nonsense secretary Liesl Weiss has concerns much closer to home. The Great Depression is tightening its grip, and Liesl is the sole supporter of two children, an opinionated mother, and a troubled brother.

In the summer of 1918, Captain Marcus Weatherford arrives in Russia on a secret mission, with a beautiful ballerina posing as his fiancee. Marcus searches for the Romanov tsarina and her son—who both allegedly survived the murdering Bolsheviks—and the information behind an allied plot to assassinate Lenin. But Marcus's sense of duty battles his desire to return home to Clare—his actual love.

Bertie Jenkins has spent forty years serving as a midwife for her community in the Great Smoky Mountains of East Tennessee. Out of all the mothers she’s tended, none affects her more than the young teenager who shows up on her doorstep, injured, afraid, and expecting, one warm June day in 1943. As Bertie and her four sisters tenderly nurture Songbird back to health, the bond between the childless midwife and the motherless teen grows strong. But soon Songbird is forced to make a heartbreaking decision that will tear this little family apart.

April, 1912: It's the perfect finale to a Grand Tour of Europe—sailing home on the largest, most luxurious ocean liner ever built. For the Fortune sisters, the voyage offers a chance to reflect on the treasures of the past they've seen and contemplate the futures that await them. For Alice, there's foreboding mixed with her excitement. A fortune teller in Egypt gave her a dire warning about traveling at sea. And the freedom she has enjoyed on her travels contrasts with her fiance's plans for her return—a cossetted existence she's no longer sure she wants.

Shaken by her parents’ divorce and discouraged by the growing chasm between herself and her serious boyfriend, Nikki Werner seeks solace at her uncle’s farm in a small Missouri hamlet. She’ll spend the summer there, picking up the pieces of her shattered present so she can plan a better future. But what awaits her at the ancestral farm is the past—one she barely knows.

Caroline Payne thinks it’s just another day of work until she receives a call from Mat Hammond, an old college friend and historian. But pleasantries are cut short. Mat has uncovered a scandalous secret kept buried for decades: In World War II, Caroline’s British great-aunt betrayed family and country to marry her German lover. Determined to find answers and save her family’s reputation, Caroline flies to her family’s ancestral home in London.