Szymon Jereth is the owner of Jereth’s Box Factory, which is forcibly turned into the German Box Factory after the German invasion of Poland. The factory ends up being the backyard of Oskar Schindler’s enamelware factory in Cracow. Jereth continues to work at the factory after the takeover. Then, after all Cracow Jews are sent to the concentration camp Płaszów, he is eventually added to Schindler’s list and taken to Brinnlitz with his family.