They are sitting in Grandpa's shed. The stray dog and the two children, Prince Neumann and Lotta. The dog tells a story, as there are tasty chicken skins and a warm place to sleep. The dog talks about G. Ott, the great inventor, and Lobkowitz, who was G. Ott's best friend. "Can't be done, doesn't exist!" was his motto, and G. Ott never grew tired of creating the world. But then there was a quarrel, and G. Ott threw Lobkowitz out of his garden, despite their close friendship. It's clear: Lotta and Prince Neumann must do something!.