One day, Johanna comes crying into her grandfather's garden because she was being teased at school. A small rain cloud hovers above her head. But then Grandpa Günther comes to the rescue. He knows how to banish bad thoughts and plant new, good ones in the mind. Just like you plant beautiful flowers in a garden. Johanna learns that small storms in the mind are completely normal, just as flowers need water to grow. Grandpa Günther shows her how to plant more and more flowers, or rather good thoughts, so that the garden in her mind becomes bigger and more beautiful. He also reveals to her that you can plant the flowers in other people's minds as well. An enchanting children's book about the power of thoughts. A children's book that also gives adults food for thought and is a plea for mindfulness, humanity, and kindness to one's fellow human beings.