The protagonist was sent to South America after the war. Now he is back home and wants to meet his old love. At the same time, he takes on the job of looking after his in-laws' children, two very bad boys, while their parents are on holiday abroad. What will become of it? Anyone who meets the "fantastic aunt" at the beginning of the film, as well as Huba and Csaba, will have an inkling.

Professor József Öveges was a famous Hungarian physicist and television personality, who starred in a very successful educational programme, teaching nature sciences for children in Hungarian Television in the 1960s. This movie contains his favorite experiments.

Our old friends Bence the Great Hunter, Andris, aka Mr. Doolittle, the Painter and then Bonca the Bird appear in this film. But then Nora appears and everything goes haywire. The film follows Nora and her mum as they become "Bonca".