Suddenly, an impossible chance to save her father falls into Meg's lap. After following a trail of blood in the snow, Meggie finds an injured British spy hiding in her grandmother's barn. Captain Stewart tells her that a family of German refugees must be guided across Nazi-occupied France to neutral Spain, whereupon one of them has promised to free Meg's father. Captain Stewart was meant to take that family on their journey, but too injured to complete the task himself, he offers it to Meg, along with a final code from Papa to help complete the mission -- perhaps the most important, and most difficult, riddle she's received yet.
As the Nazis flood Meg's village in fierce pursuit, she accepts the duty and begins the trek across France. Leading strangers through treacherous territory, Meg faces danger and uncertainty at every turn, all the while struggling to crack her father's code. The message, as she unravels it, reveals secrets costly enough to risk the mission and even her own life. Can Meg solve the puzzle, rescue the family, and save her father?
Soon Chaya joins a resistance cell that runs raids on the Nazis' supplies. But after a mission goes terribly wrong, Chaya's network shatters. She is alone and unsure of where to go, until Esther, a member of her cell, finds her and delivers a message that chills Chaya to her core, and sends her on a journey toward an even larger uprising in the works -- in the Warsaw Ghetto.
Though the Jewish resistance never had much of a chance against the Nazis, they were determined to save as many lives as possible, and to live -- or die -- with honor.