The heroes of the film are first-graders Snezhana and Alyosha Seroglazov, who received the nickname "TwoBriefcases" because of his small stature on the first day of attending school, as well as a small puppy Kysh.
Based upon the story by R. L. Stevenson, the film shows Orson Welles as Long John Silver, pirate chief, who would like to find hidden treasure.
A military academy graduate, Andrei Kartashov, receives an assignment to serve in his hometown. However, the hero is not happy about it and asks the higher authorities to send him to the Far East instead...
