Borja and Seva live on the bank of the Dnieper. In summer, during vacations, they help adults by delivering letters. Suddenly they learn that a poacher has appeared in the village. The boys start their own investigation.
Leonid Kharonsky
as Sevka
Nikolay Ashikhmin
as Boris
Павел Луспекаев
as Stepan (shofyor gruzovika)
Николай Крючков
as Ivan Zakharovich (major militsii, otets Borisa)
Леонид Харитонов
as Valka (kapitan rechnogo buksira)
Алевтина Румянцева
as Polina Ivanovna (mama Sevki)
Анатолий Соловьёв
as papa Sevki
Эммануил Геллер
as Pastukh zavyazavshiy s alkogolem
Владимир Гуляев
as inspektor rybnadzora
Mikhail Zimin
as Vizunov
