Brave boys, known as taehniks, embark on a perilous quest to find a long-abandoned copper mine, despite facing numerous obstacles. Their journey takes a dangerous turn when they clash with an illegal claimant to the mine, the cunning hunter Anikin.
The orphanage's pupils are sent by the district Komsomol committee to eliminate illiteracy in the remote village of Penki.
A story about how Senya and Vanya, notorious pranksters and hooligans, were forced by circumstances to take care of two little nephews of a pioneer leader and became victims of these mischievous boys' antics.
