Somewhere in the Bavarian province the robber Hotzenplotz is up to mischief. One day he robs Kasperl's grandmother's coffee grinder. Since the goofy sergeant Dimpfelmoser sees little hope of finding the robber, Kasperl and his best friend Seppel decide to track down the robber themselves. With a ruse, they manage to find the robber's cave, but are then caught by Hotzenplotz, who sells Kasperl to the magician Zwackelmann.
By a stupid coincidence, single mother Tanja and her two children have to share their vacation home on the Cote d'Azur with the writer Paul Wackernagel. A pure battle of the sexes breaks out between the author of chauvinistic advice books for suffering men and the divorce lawyer.
The tenth summer of Kalli is certainly one of these magical experiences. Along with his friends, he initially planned great things, including opening a zoo - however, one that not only offers the ordinary creeping or fluttering items in a preserving jar, but a true sensation...
