The documentary tells the story of the life and the unique endeavours of Dorbri Zheliazkov, a pioneer in Bulgarian industry, who set up the first factory within the Ottoman Empire ever. Educated and go-getting, he was an ingenious organizer, inventor and merchant, who took part in the struggles of the Bulgarians for liberation. Forced to immigrate to Russia, he then brought back know-how and industrial technologies. A truly Renaissance man of his age, he readily sponsored socially useful causes. The vicissitudes of life never shook his unbreakable spirit.