Kató Kelemen is asked by her father to go to his office and welcome an important business partner of his. When Mr. Andersen arrives he assumes Kató is a secretary and instructs her to deliver a letter. He's about to travel to Venice with his nephew who he has never met before. Since Kató falls in love with Andersen at first sight, she decides to dress like a boy and pretends to be the nephew.
Unfortunately the movie Én és a kisöcsém is not yet available on HBO Max.
| Writing | György Kardos G. | Adaptation |
| Directing | Gyula Maár | Director |
| Crew | Dezső Kellér | Poem |
| Crew | János Vecsernyés | Cinematography |
| Writing | László Szilágyi | Idea |
| Crew | Imre Harmath | Poem |
| Sound | Mihály Eisemann | Music |
