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.
On the train to Prague, the bride-to-be Zuzana Vítová accidentally meets the clerk Dr. Karel Jánský. Upon arriving in Prague, it seems that Jánský follows the girl on her way from the station, but it turns out that the two of them have only a common journey. When Zuzana discovers that her fiancé Petr Klika is not at home and that she has lost the keys to his apartment, Dr. Jánský gallantly helps her and keeps her company until deep into the night...
