opka, the distinctive sandwich-board man, is able to apply himself to any situation. The truck in which he sleeps is one day coupled to a train which takes Kokrhel, the general inspector of the railways, on an inspection tour of the area. The discovery of a stowaway causes an unplanned stop at the station in Mokré nad Soupravou. opka runs away and Kokrhel orders that he be found and punished. The local station master Jelen is unfortunately absent, having left for a choir rehearsal. The charming Mrs Jelen therefore warmly welcomes opka as he appears in her husband's uniform and passes himself off as the station master. Kokrhel is extremely taken with the young woman and, in the light of her smile, he wholly overlooks the station master's total incompetence. He decides to fulfil Jelen's request for a transfer nearer the capital. When the real station master shows up, Kokrhel starts behaving in an unpleasantly businesslike fashion. opka reminds him, however, that in flirting with the young lady, he had forgotten his duties and now he must carry out his promise.
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