On 21 July 1942, the Nazis invaded Poland. In the small town of Zolkiew, life for Jewish 15-year-old Clara Kramer was never to be the same again. While those around her were either slaughtered or transported, Clara and her family hid perilously in a hand-dug cellar. Living above and protecting them were the Becks. Mr Beck was a womaniser, a drunkard, and a self-professed anti-Semite, yet he risked his life throughout the war to keep his charges safe.