In a walled garden adjoining an animal laboratory, a doctor conducts experiments using animals to develop serums against diseases spread by flies. A woman inspector, alarmed by perceived cruelty, confronts him while a small boy brings food and watches. Tensions between animal welfare and medical necessity unfold as the doctor explains his methods and demonstrates a serum that saves the boy, prompting the inspector to reconsider her opposition. The short fantasy uses a cast of animals and human characters to dramatize ethical conflict, practical compassion, and the uneasy compromises of scientific work.