Based on the operetta of the same name by Isaak Dunayevsky.

The port town of one of the small southern countries. After the Nazi occupiers left, the port's berths were empty, the steamers did not smoke, cargo cranes stood. Fearing retaliation for collaborating with enemies, port owner Georg Stan fled the city. After waiting a while and securing the support of local authorities, Stan nonetheless returns - and loading operations begin in the port.

While loading oranges, the sailor Yango and the beautiful Stella are preparing for the wedding. Suddenly, Stan makes a proposal to the girl and tricks her into agreeing. Upon learning of the deception, the girl runs away to Yango. Having discovered weapons intended to support fascism in the drawer of the hold, the heroes do everything possible to make the boxes fall to the bottom of the sea.