Children's pioneer camp on the coast of Black Sea. On the eve of the war game "The Classified City" - annual and traditional , someone steals the team bugle - a source of pride for the entire squad.
The boy Fedya met mysterious The Wall Painter, who gave him his magic brush, with which anybody could do good deeds. But only for a half of hour. The agents of the evil king - The Gray and Abricadabr - hunt for boy. They want to destroy the magic brush and cancel all good deeds in the world
