The film tells about the activities of the association of composers "The Five", who were drawing inspiration from Russian folk art. Like many representatives of the Russian intelligentsia, members of this musical community were imbued with the plight of the peasants and sought to write works that would draw people's attention to this poorest layer of society.
The young composer Modest Mussorgsky decides to devote his life to music and to make it the property of the people. Only his mother supports his “ignoble” undertakings. The young man leaves military service and ponders writing a work about the peasants, together with members of The Five.
The Imperial Musical Society is not pleased with the activities of composers; it excludes Mily Balakirev. The writer Vladimir Stasov expresses his opinion by calling the Society newspaper musical liars, eventually ending up in court for libel, and being sued for a monetary penalty. During a trial, many supporters of "The Five" are presented.
A peasant music school, created by composers, is described for debts. Meanwhile, not one of the editions of Mussorgsky's opera Boris Godunov was allowed to appear in the imperial theaters. The directorate surrenders when the whole city begins to protest; the opera is a tremendous success. Boris Godunov radically changes the direction of the work of Russian composers.