Jan Kačer became known primarily as an actor, but he also took up film directing several times - not very successfully. Based on someone else's script, he made a committed, building story: it tells the story of an experienced engineer who is commissioned to assemble a team of specialists for engineering the peaceful use of atomic energy. However, the explanation of human dilemmas is too flat and proclamatory, as is the image of Ostrava's industrial environment; the heroes are thinking about one thing: the proper completion of the assigned task...

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.