Petr is a courier, a messenger as a matter of fact. He is one of those young men who believe that on their bikes they have become part and parcel of the atmosphere of modern cities. He is a non-conformist who refuses to settle into today‘s deformed society, he abhors its indolence, consumerism and lies, as well as its pseudo-truths, pseudo-feelings, pseudo-loves and pseudo-values. Petr’s untrammelled personality keeps causing more and more serious problems. And Petr is also one of those who will never admit to themselves that they might be at the end of their tether.

The fairy tale is based on two fairy tales by Božena Němcová, "Righteous Bohumil" and "The Black Princess". It tells the story of a weak king and his wife, whose desire for a child leads her to a conspiracy with the devil. The princess, who grows up under the influence of the "impure" powers, only escapes from their power thanks to her love for the fisherman Radek.