A Red Army officer Polevoy possesses a navy dirk with a secret message encrypted in its handle. The second part of a message belongs to a White army officer Nikitskiy. It's up to three young friends of Polevoy to uncover the mystery.
Nikitsky
Misha's grandmother
school principal
Filin
uncle Semyon
Mariya Gavrilovna Terentyeva
Polevoy
Misha's grandfather
Sviridov
Slavka's father
Agripina Tihonovna
lineman
philatelist
Genka
Bandit
Misha Polyakov
uchitel po vozhdeniyu
Genka's father
Kolya Sevastyanov
Bor'ka-Zhila