The young Benda tries to improve the running of his farm but, just before the harvest, he loses his horse for whose medical treatment he receives a large bill from the veterinary surgeon. At a time of his greatest need he meets his former classsmate Neumann who convinces Benda to buy a petrol tractor from the firm Praga. He takes his friend to a farm where he demonstrates all advantages of the product. Benda convinces himself of the benefits of owning the tractor and he decides to buy it. He asks his father to lend him the money for it but his father is of the old school and doesn't want to hear of any new-fangled ideas. The young Benda buys the tractor on a hire-purchase scheme and the whole village is witness to his agricultural accomplishments. Finally, even his stubborn father recognises the perfection of the machine and, after a short time, drives the tractor himself with two very special passengers – his son and his bride.
The film promoted the Praga multi-purpose tractor manufactured in the Kolben-Daněk plant.