Blind Mimi and her best friend, LÃza, discover a beautiful garden behind their house. A little magical gardener looks after it. He shows them the wonders of the passage of nature's cycles, of ripening and growth. The fourth part of the popular series also reflects on an environmental problem, namely the accumulation of waste and its devastating impact on nature. The prose includes a strong element of fantasy and is also full of action, adventure and suspense. The conclusion of the story highlights the need to reuse broken, used or old things.