Based on the book of Viktor Dragunsky Deniskins Stories. Once upon a time there lived in Moscow the 1950s an October school student Deniska Korablyov. Every day he was terribly busy with the most ordinary childrens activities he did not prepare lessons, quarreled and put up with classmates, helped around the house and dabbled. He also planned a real murder, crossed paths with the criminal Fantômas, exposed the adult liars and thieves, participated in the selfless rescue of man...