At the amateur talent show the boy, accompanying himself on the accordion, sings a song about Moscow... The plot of the movie is based on the story of the director of the school about how this accordion, once belonging to a cadre worker who died during a demonstration in 1905, has been in many hands before it got to the guys.

Sergei Filippov
as Brykin, the accordionist (as S. Filippov)

Pavel Kadochnikov
as Konstantin Nikolaevich Zlatogorov (uncredited)

Nikolai Leonov
as Kolya Leonov (as N. Leonov)

Ivan Lyubeznov
as School Director (as I. Lyubeznov)

Boris Tenin
as Playwright (as B. Tenin)

Georgiy Vitsin
as Railwayman (uncredited)

T. Stravinskaya
as Tanya Nikanorova

Oleg Bobrov
as Oleg (as O. Bobrov)

Viktor Seleznyov
as Fedya (as V. Seleznyov)

Boris Bodrov
as Boris (as B. Bobrov)