During hot summer in a compartment of a train en route to the city Yuzhnogorsk four passengers come into view.

Murashko (who in reality is a petty crook and profiteer), together with his companion, hoodlum Stepa, transport oranges to Yuzhnogorosk to sell them on the market.

In the course of the trip, Kostya infatuated with Tatiana, offers her unexpected entertainment: to play the lottery "Sportloto".

Soon, a newspaper publishes results of the lottery draw, and Kostya and Murashko (independently) learn the amazing news: Tanya has won 20 thousand rubles!

Golubev himself is on the alpine base "Eagle Shelter", and the one who first meets with Misha, becomes the owner of a huge payoff.