Two Furnaces For Udarnik Josip Trojko shows the remains of what used to be a large iron industry, following the disassembling and cutting into pieces of a famous Siemens-Martin furnace which used to be the heart of former forge. In that furnace, the workers beat the world record several times in producing steel. Sons of those workers, with unhidden emotions, are slowly destroying the furnace, cramming it into a goods van which leaves the forge. On a narrative level of the film, the above described pictures follow off camera political speeches of enthusiasm and ideological optimism from the period when the old furnace was in operation, as well as many telegrams which the forge workers addressed to Tito, and he to them congratulating them on work results.