Life of Czechoslovak soldiers in a military unit for the so called "politically unreliable" - the Technical auxiliary battalions, aka "the black barons". Although it might seem like a political satire and it's mostly funny, it shows the reality and the absurdity of military service under the communist regime. Based on a novel by Miloslav Svandrlik.
Prince Victor looks in vain for a swan which was wounded by one of his servants. Instead he discovers a beautiful girl with golden hair who has an arrow in her shoulder. She is dumb and can't explain her origin. He falls immediately for her. The girl quickly recovers, but disappears mysteriously.
Dora, a lazy and evil woman, is in love with her servant, Hannes. Hannes, however, loves her sister-in-law, Margareta. When Dora learns about this, she vows revenge against the couple.
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