The story of a gypsy named Fabian, who came to work in Kunčice, and his son. Their lives change fundamentally on the great construction site of socialism. They both learn to read and write; Fabian becomes a skilled welder, and little Fabian is accepted into the pioneer organization. However, their transformation is not easy, it is not without many encounters, just like the transformation of Fabian's co-workers, many of whom have not yet overcome their racist prejudices.

Otto Lackovič
as Fabián

Dušan Klein
as Fabiánek

Ladislav Chudík
as Trojan

Otomar Krejča
as Engineer Krása

Věra Bublíková
as Vlasta, teacher

Bohuš Záhorský
as Tereba

Robert Vrchota
as

Eva Kubešová
as

Bohumil Machník
as

Josef Bek
as