Country tailor Florian Svíčička neglects his work because of his interest in medieval history. When preparing an amateur performance at Zdislavice Castle, he gladly replaces the bailiff and plays the role of a knight. However, he ruins the performance and is shamefully banished. On his way home, he witnesses a horrific scene in the forest: two knights behead a young girl. It later turns out that it was a filming, and the girl Hana, a double for the famous diva Elvíra, spends the night with Florian at the castle because the filmmakers accidentally leave her. The master loses patience with Florian's excesses and Florian is fired from the tailoring shop. He sets off for Prague to find the girl he was with at the castle the night before. However, he does not know her name and accidentally comes to Elvíra's villa. The diva is not at home. Florian finds a love letter in the villa and thinks it is addressed to him. However, upon his return, Elvíra mercilessly throws Florian out...

The tailor Florian Kerzl is immersed in the Middle Ages. When he spoils the celebrations for the 500th anniversary of the founding of the town of Zdislavice, he is banished from the town. So he moves in his armor to the nearby ruins of a medieval castle. Where Florian has several interesting adventures and even falls in love with the film extra Hanni. Eventually he finds a treasure in the cellars of the old castle, containing the will of the former castle lord.