Good-looking Edita Beningerová (Jana Brejchová) arrives at a chemical factory in the North Bohemian town of Ústí nad Labem together with her young assistant Nada (Zlata Adamovská). She is hoping that her ex-husband, outstanding practical chemical engineer Vik Panc (Eduard Cupák), will help her conduct an experiment to validate her proposed theoretical method of isolating cholesterol from lanolin. The success of Edita's invention is crucial for her career at the Prague Institute of Chemistry. Vik's roommate from his hostel Bréta (Ivan Vyskocil) is thrilled. He will finally meet the mysterious and fascinating Edita about whom he has learned so much from Vik.
| Writing | Vladimír Páral | Novel |
| Directing | Jaromil Jireš | Director |
| Writing | Miroslav Hladký | Creative Producer |
| Directing | Miloš Kohout | First Assistant Director |
| Directing | Michal Vostřez | Assistant Director |
| Crew | Adriena Váchová | Script |
| Writing | Mária Rudlovčáková | Screenplay |
| Writing | Jaromil Jireš | Screenplay |
| Crew | Zdeněk Dufek | Dramaturgy |
| Camera | Emil Sirotek | Director of Photography |
| Camera | Michal Kulič | Camera Operator |
| Camera | Milan Kopecký | Assistant Camera |
| Art | Oldřich Bosák | Production Design |
| Art | Bohumil Nový | Assistant Production Design |
| Art | Zdeněk Jeřábek | Set Decoration |
| Art | Rudolf Kinský | Set Decoration |
| Art | Miroslav Stibr | Set Decoration |
| Art | Viktor Gajdoš | Set Decoration |
| Costume & Make-Up | Svatava Sophová | Costume Design |
| Costume & Make-Up | Zdena Šnajdarová | Lead Costumer |
| Costume & Make-Up | A. Pavlíková | Costumer |
| Costume & Make-Up | Eva Vrbovcová | Costumer |
| Costume & Make-Up | František Příhoda | Makeup & Hair |
| Costume & Make-Up | Valerie Černá | Makeup & Hair |
| Editing | Josef Valušiak | Editor |
| Editing | Růžena Hejsková | Assistant Editor |
| Editing | Jana Šimonová | Assistant Editor |
| Sound | Antonín Kravka | Sound |
| Production | Eliška Nejedlá | Production Manager |
| Production | Jana Koubová | Unit Production Manager |
| Production | Ladislav Beneš | Unit Production Manager |
| Production | Dagmar Jonášová | Assistant Production Manager |
| Camera | Barbora Brožková | Clapper Loader |
| Lighting | Otta Pšenička | Gaffer |
| Camera | Jan Kuděla | Still Photographer |
| Sound | Ladislav Štaidl | Original Music Composer |
| Sound | Ladislav Štaidl | Conductor |
| Sound | Milivoj Uzelac | Conductor |
