In 1942 sixteen-year-old Chaya Lindner is a Jewish girl living in Nazi-occupied Poland, a courier who smuggles food and documents to the isolated Jewish ghettos in southern Poland, depending on her forged papers and "Aryan" features--but when a mission goes wrong and many of her colleagues are arrested she finds herself on a journey to Warsaw, where an uprising is in the works.

With the rise of the Berlin Wall, twelve-year-old Gerta finds her family suddenly divided. She, her mother, and her brother Fritz live on the eastern side, controlled by the Soviets. Her father and middle brother, who had gone west in search of work, cannot return home. Gerta knows it is dangerous to watch the wall, to think forbidden thoughts of freedom, yet she can't help herself. She sees the East German soldiers with their guns trained on their...

It is June 6, 1944, D-Day, and Dee Carpenter (true name Dietrich Zimmermann), an underage private in the United States Army, is headed for Omaha Beach, seeking revenge for his uncle, who was arrested by Nazis when Dee was a little boy; meanwhile, Samira Zidano, an eleven-year old French-Algerian girl is looking for the French resistance, desperate to deliver the message that the invasion is about to begin, and get their help in freeing her mother--this...

A story told in alternating chapters from each girl's point of view follows polar opposites Allie and Sage, one American and one British, who become friends and confidantes when their families swap houses.

Following the end of World War II, Ukrainian sisters Krystia and Maria reunite in a displaced persons camp, where they are falsely accused of collaboration with the Nazis and face interrogation by the Soviets for crimes they never committed.