Orphaned during her passage from Ireland, young, white Lavinia arrives on the steps of the kitchen house and is placed, as an indentured servant, under the care of Belle, the master's illegitimate slave daughter. Lavinia learns to cook, clean, and serve food while guided by the quiet strength and love of her new family. In time Lavinia is accepted into the world of the big house, caring for the master's opium-addicted wife and befriending his dangerous yet protective son. She attempts to straddle the worlds of the kitchen and big house, but her skin color will forever set her apart.

Elise Sontag is a typical Iowa 14-year-old in 1943 - aware of the war but distanced from its reach. Then her father, a legal US resident for nearly two decades, is suddenly arrested on suspicion of being a Nazi sympathizer. The family is sent to an internment camp in Texas, where behind the armed guards and barbed wire, Elise feels stripped of everything beloved and familiar, including her own identity. The only thing that makes the camp bearable is meeting fellow internee Mariko Inoue, a Japanese-American teen from Los Angeles.

Sophie Whalen is a young Irish immigrant so desperate to get out of a New York tenement that she answers a mail-order bride ad and agrees to marry a man she knows nothing about. San Francisco widower Martin Hocking proves to be as aloof as he is mesmerizingly handsome. Sophie quickly develops deep affection for Kat, Martin's silent five-year-old daughter, but Martin's odd behavior leaves her with the uneasy feeling that something about her newfound situation isn't right.

In 1918, Philadelphia was a city teeming with promise. Even as its young men went off to fight in the Great War, there were opportunities for a fresh start on its cobblestone streets. Into this bustling town came Pauline Bright and her husband, filled with hope that they could now give their three daughters - Evelyn, Maggie, and Willa - a chance at a better life. But just months after they arrive, the Spanish flu reaches the shores of America.

Pino Lella wants nothing to do with the war or the Nazis. He's a normal Italian teenager - obsessed with music, food, and girls - but his days of innocence are numbered. When his family home in Milan is destroyed by Allied bombs, Pino joins an underground railroad helping Jews escape over the Alps, and falls for Anna, a beautiful widow six years his senior. In an attempt to protect him, Pino's parents force him to enlist as a German soldier - a move they think will keep him out of combat.