Prague, the beginning of the 17th century. Rozina falls in love with Italian glass worker Nikolo, but after returning home, she gets a message that will never come to Prague. She falls for the promise of an older man to marry her, but when Nikolo does return, the tragic fate of Rozina is sealed.
The rude and bitter mining engineer Štěrba strongly opposes the proposal of his colleague Ing. Vochoče to reopen mining in the old mine. Vochoč's plan is precisely prepared and could solve many problems. However, Štěrba does not want to explain anything to anyone, he does not want to talk to...