Based on the book of Viktor Dragunsky "Deniskin's Stories". Once upon a time there lived in Moscow the 1950's an October school student Deniska Korablyov. Every day he was terribly busy with the most ordinary children's activities: he did not prepare lessons, quarreled and put up with classmates,...
Pupils of the ordinary high school organize a “secret society” under the motto “Help the offended and weak, avenge widers and upstarts!” The new pioneer leader supports the children, and soon he manages to make the school life of the children truly fascinating.