A wonderful fairytale about looking for love, defeating evil and learning some valuable moral lessons on the way. The story begins with the young Prince Velen, who is left in charge of the castle and his three sisters. During the night he has a visitation and before he knows it, all his sisters are married off and gone away, and himself falls in love with beautiful Večernice. Now he is faced with the King's wraths and charged with a quest. The journey, however, hides obstacles and danger; not only treacherous merchants and robbers, but also a evil wizard Mrakomor...

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.