The musical version of the successful play of Oldřich Daněk was transferred to the screen by director Jiří Sequens in 1986. It takes place in the 14th century in Bohemia during the reign of King Wenceslas IV. Heroes of the story are three mercenaries who always fight on the wrong side and are always beaten, but they are moral winners of all conflicts and skirmishes.

An image and music collage - a cinema concert - guided by a young sound engineer David, for whom the exhibition on E. F. Burian is an incentive to take more interest in this avant-garde artist. The film interweaves two strands - documentary and factual, drawing on contemporary material and archival images - and fictional with the story of David the sound engineer.