A drama set in the Vítkovice Ironworks at the end of the occupation. It depicts the struggle of Ostrava steelworkers to save the blast furnaces, which the retreating Nazis want to blow up.

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.