The story of a traveling comedy family that ends up in court, where young Fricek is charged with attempted murder because he protected his sister Olga from a rapist.

It is the 1920's. The good-looking hostess Věra demonstrates household robots to visitors of the Futurum exhibition. Young inventor Petr comes to her rescue when she tries to flee from two men wanting to take her away. Věra confesses that she has fled from home because her father, a factory owner, wanted to profitably marry her off. Petr is fascinated by the emancipated woman and shows her round his laboratory, where he plans to create a robot of his own - but one that would be far more advanced. Věra cuts herself on a broken test-tube and a drop of her blood gets in the solution. In the morning, they are taken aback to see Věra's double. This lucky chance has helped Petr create an artificial being, Miss Golem. She has a single motive for her actions: to take care of Věra and allow her to do only what is good for her.

You will meet the family of the miller Kaliba, who is proud not only of his mill, but also of the family tradition, according to which the milling profession has been passed down at the inn's mill for almost three hundred years. And since Mr. Kaliba has no son, it is certain that his only daughter Liduška must marry a miller. Perhaps this would have happened if the Kalibas had not gone to the anniversary exhibition. Here, Liduška meets the handsome engineer Karel Loukota, who is an overly zealous member of the cycling club "Don't Get Married!", but is not immune to love at all. Of course, he will face many hardships and obstacles, the biggest of which is, of course, the miller Kaliba with his fierce efforts to uphold the family tradition...

This romantic story turns on a stirring infatuation that takes hold of three young people under the influence of Simon, a Prague student. After the study year, 18 year-old Julio returns to his parental home, a little chateau on the Otava river. There he converges with his childhood friend Petr and the young boatman's daughter Klárka. Sharing her beguilement with Simon, who has quickly turned a tranquil summer atmosphere into a relationship drama, is Julio's cousin Rosa.