A boy escapes from a reformatory, but comes again into conflict with the law. During a robbery he hits a woman with a bottle on the head. He is convinced he killed her and because of his past thinks that nothing matters anymore. Only when he finds out that the victim did not die, he reveals the truth about what happened.
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.
