There is a gang operating in one of the provincial juvenile detention centers. Its members are the delinquents, and leading them are two of the correctional officers: Jóźwiak, and Andrus. The owner of a currency exchange booth dies during a certain robbery. One of the robbers: Adam Niedzicki. The boy takes his punishment for breaking and entering, and theft. Inside the detention center, he's called by his alias, "Mruk." The last incident causes Adam to cave. He gets scared, and refuses to participate in future crimes. But the relentless Jóźwiak tries to convince the boy to change his mind--in any way he can.