WorldFanny is supposed to spend a summer week with Grandpa, although everything in his old house is strange to her. Suddenly there is a hole in the hall outside her room and she descends a long flight of stairs into the cellar. There she meets a toad, a swan, a potato man and twenty-nine woodlice who are very agitated: The toad Lelalulah, who is the only one who always goes outside and provides the others with stories from upstairs, has disappeared! Now Fanny is supposed to help them all by telling stories. Although the world outside seems dangerous, the cellarlings come to trust Fanny and let her lead them out into the open. And finally it is also revealed why Grandpa Balz is digging in the garden all the time and what this has to do with his girlfriend Floriana, whom Fanny only gets to know better thanks to the cellarlings.