Mikolás and his brother Adam end up with a young German hostage of noble blood during a robbery. While their clan prepares for the wrath of the German king, Mikolás is sent to pressure his neighbor Lazar into a defense pact. Persuasion fails and he abducts Lazar's daughter Marketa on the eve of her initiation as a nun in an act of vengeance.
Martin, a poor student, volunteers to go on a quest to find a cure for the princess Adriana, who is stricken with a strange illness. Unknown to Martin or anyone else, the princess is actually under the spell of the powerful magician Andlobrandini, who is preparing a rejuvenating elixir made from the blood of nine men's hearts.
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.
