The best thing about Tilli's school is the school café "Pustekuchen." Here, Tilli's grandma Moma bakes her legendary muffins and helps with all kinds of disasters. The school café "Pustekuchen" is something truly special, Tilli believes, and she helps her grandma Moma wherever she can. But Moma is dissatisfied: she no longer wants to use supermarket tomatoes that have traveled halfway around the world. From now on, only vegetables from their own garden will be used in "Pustekuchen"! However, the quarrelsome neighbor Mrs. Wurstmayr sees Moma's and Tilli's pesticide-free garden as a thorn in her side. And what will she say when the two take in the chickens from the sick farmer Knoll? The next morning, not only Moma, Tilli, and Jacob are woken up by the cheerful crowing of the rooster, but also Mrs. Wurstmayr.