Sometimes, the deadliest enemy lies within. It is 1942, and war is raging in Europe. Monika Ritter is in New York with her husband, Michael. Haunted by memories of her childhood in Germany and her father’s death at the hands of the Nazis, she longs to do her bit against Hitler’s rampaging armies. When Michael joins the new Army Air Force as a bomber pilot, Monika takes advantage of an invitation she receives to join the OSS, a fledgling group of spies with the mission to turn the war by gathering the most vital asset of all—information.

Germany, 1943. Jordanna cries out desperately to her mother, tears spilling down her cheeks. She is being torn one way, her parents another. And in Jordanna’s terrified, wide brown eyes, there is only one question: Will I ever see you again?

Nazi-occupied Prague, 1942: Amelia is hiding in her closet when flashlights blind her and she’s captured by the SS. Out on the cobblestone street, her heart shatters as her mother is shot before her eyes. She is shoved onto a freight train with hundreds of others—hours pass as they travel in darkness. Arriving in a concentration camp, Amelia fears for her life when she is led to a block by a soldier. He is her enemy, yet he secretly passes her a piece of bread; an act that saves her.

Occupied Italy, 1944. In the mountain regions south of Bologna, Liliana Nicoletti’s family finds escaped POW James Foley behind German lines. Committed to the anti-Fascist cause, they deliver him to a powerful band of local partisans. But when the SS launches a brutal attack against the Resistance, Liliana’s community is destroyed. Forging an unbreakable bond, James and Liliana's only hope of survival is to make it to the Allied lines. Twelve years later, fate reunites Liliana, newly widowed, and James, now a journalist for a New York magazine.

Eleven-year-old Nico Krispis has never told a lie. When the Nazis invade his home in Salonika, Greece, the trustworthy boy is discovered by a German officer, who offers him a chance to save his family. All Nico has to do is persuade his fellow Jewish residents to board trains heading “north,” where new jobs and safety await. Unaware that this is all a cruel ruse, the innocent boy reassures passengers on the station platform every day.