1941, Hitler's army crosses into Soviet-ruled Ukraine in a secret mission titled "Operation Barbarossa. A young Jewish girl, Hanna Slivka is fourteen when German soldiers arrive in her small village of Kwasova. Until their arrival, Hanna has split her time between playing with her younger siblings, sharing drawings with the sweet shy Leon Stadnick, and assisting her neighbor, Mrs. Petrovich, with her annual dyeing and selling of psyanky, decorative eggs.  But now, she, Leon and their families are forced into hiding, first in the woods outside of their town and then into caverns beneath it. They battle sickness and starvation, and the local peasants who join the Nazis in hunting Jews through the ravaged countryside, but at no time are they more tested than when Hanna's father – briefly above ground to scavenge for food – goes missing, and suddenly, it's on Hanna to find him, and to find a way to keep her mother, brother and sister alive. This novel is inspired by the true story of Esther Stermer and her family, who survived underground for 511 days. Less than 5% of the Jewish population in Ukraine survived these Holocaust "Actions."