When we meet Aron, he is a beguiling and perceptive and not always happy young boy coming into awareness of himself and his family's struggles. When soon they are driven from the countryside into Warsaw, their lives are changed forever. Aron and a group of boys and girls risk their lives scuttling around the ghetto, smuggling and trading things through the "quarantine walls" to keep their people alive, while they are hunted by blackmailers and Jewish and Polish and German police, as gradually things catastrophically worsen, people begin to disappear, and survival is threatened on all sides. Eventually, Aron comes to know Janusz Korczak, a Jewish-Polish doctor famous for his advocacy of children's rights, whose orphanage was relocated to the ghetto once the Nazis swept in. In the end, he and the children he takes care of, Aron among them, are brought to the station to be put on a train to Treblinka.