Svítání.

The family of the worker Kučera lives happily. His daughter Anežka, engaged to technical draftsman Adolf, is a seamstress. His son Váš is studying to be a machinist. The family also includes his grandfather, a former miner. However, an economic crisis is beginning. Factories stop production. Adolf loses his job and has an argument with Anežka, who has no idea the cause of his nervousness.