A Czech agricultural student, Šimon Plánička, arrives at the small South Bohemian town of Hoštice, and joins the local JZD (agricultural co-op) with the intention of trying out his experiment regarding the "Milk yield of cows in regards to a cultured environment". He runs into difficulty with the directorship of the JZD, but he finds them eager to help once they hear he's the son of the local agricultural commissioner, as his last name is also Plánička. Blažena Škopková is given the task of finding out how things are looking. However everything is complicated by the jealousy of Blažena's boyfriend Venca.
Pavel Kikinčuk
Broněk Černý
Veronika Kánská
Petra Pyšová
Helena Růžičková
Stanislav Tříska
Erna Červená
Martin Šotola
Miroslav Zounar
Jiří Lábus
Pavel Vondruška
Jaroslava Kretschmerová
Luděk Kopřiva
Vlastimila Vlková
Marie Švecová
Vlasta Mészárosová
Jiří Kostka
Karel Engel
Hana Čížková
Jiřina Jirásková
Martin Wolf
Jiří Janda
Jiří Růžička
Jiřina Jelenská
Oleg Reif
Alena Karešová
Marie Sládková
Marie Pilátová
Václav Troška
Vladimír Chvosta
Josef Bolard
Michal Kepl
Richard Kepl
Marie Soukupová
Oldřich Smetana
Libuše Fialová
Bedřiška Kelišová
Marie Pikhartová
Miloslava Ratajová
Růžena Trošková
Blažena Votavová
Karel Brázda
František Chalupecký
Miroslav Lukeš
Jan Novotný
Václav Soukup
Libuše Švormová