A phone rings in an office. All the clerks are gathered in an adjoining room, taking a coffee-break. The head of the office catches them, he is very angry, and he dismisses the lot of them from work. An intrepid young clerk offers him some food of which all of them have had a taste. It is a slice of bread spread with jam that is produced with the addition of the apple extract Koldi-Petosa. The office head finds the bread and jam quite tasty and therefore rescinds the dismissals. The advert is for the preparations of the firm Koldínský and Co., which in ten minutes produce from each piece of fruit unsurpassable jam.