A doctor is shocked when his beloved colleague Mima signs a contract with foreign car manufacturer Ferat, in order to work for them as a rally-driver. A scientist convinces him that human blood is being used as fuel for Mima's ever winning car, but does that really work?

Several of the works of writer Bohumil Říha have been filmed. This novel by the pro-regime writer also inspired a children’s film, which was directed in 1981 by the experienced family filmmaker Václav Gajer. The story takes place in 1947 and it is based on the popular model of the relationship between a human hero and an indomitable animal protagonist. The tale of the freedom necessary for life, is, of course, beholden to the standards of the time: the Hucul horse that heals an old villager, has remained in the small village in Šumava after the Soviet soldiers have left. This is a pleasing movie that engages with the acting performance of Zdeněk Řehoř and the depiction of the indisputable beauty of the Šumava landscape as shot by cameraman Jan Němeček.

Returning home to Prague, the magician Pasparte, an owner of a circus caravan, meets his dying colleague who entrusts his beautiful daughter Aloisie to his care. In Prague they all take up their lodgings at the house At Blue Fish in which they intend to arrange the programs. The firm is owned by widow Evzenie with whom Pasparte shares flat and bed. Evzenie is jealous of Aloisie therefore Pasparte sends Aloisie as a housewife to the single man Jakub Kolenatý who earns his living by photographing and wants to record the revived pictures of Prague. Pasparte wants to found in Prague the first permanent Czech movie theatre in which there would be projected also the original Czech films.

The 11-year old Jakub is living in a children's home, when he is picked up by his father. The father has been "away" for four years, the boys mother doesn't want the child. Jakub gradually finds out, that his father is hiding a secret from him. But they gradually manage to build a warm relationship and a promising new life in the city.