Based upon a true story, the movie centers on the German communist Robert, a "Kapo" in a concentration camp. When some Polish children are brought to the camp, Robert tries to save them from certain death. Due to his efforts they are being trained as masons and become part of his construction gang. Nevertheless, the boys, and mainly the clever Janusz, are very suspicious of Robert. They have already experienced too much evil and do not want to trust anybody – least of all a German.
Mundek
A mysterious Mania appears in Warsaw. The girl, together with the other children, experiences amazing adventures.
Karol is a newcomer to the class and instantly called "sissy". He tries to make friends with class bully called Balon, and eventually succeeds. The group uses him to steal lollipops and later for an assault on a small child. The victim's mother seeks out the responsible and Karol is identified. He eventually confesses to his mother and names his accomplices. Branded now as a "squealer" he is avoided by his former friends.
Krzyś, brat Mariki (w napisach: Piotruś Sot)
