In southern Moravia, in the native village of Velka Samota, a ministry official returns from Prague to lift the declining JZD he helped establish.

The leader of the fast-track workers' party is appointed worker director of the unprofitable Lucie mine. The wrong decisions he makes to increase production at any cost and to fulfil an unrealistic plan lead to a catastrophe in which his son is accidentally killed. After overwhelming criticism, the failed director wants to quit, but the senior management and party authorities continue to have faith in him...

Young Jan Stehlík signs up for a job to build a new mine. On the train he meets the pretty Alena, who falls in love with him. However, she means nothing to the superficial Jan, and when the girl becomes his lover, he treats her rudely and insultingly. But Alena's relationship troubles the honest Joseph, who really likes her.