Miss Josje seems like an ordinary teacher, but there is something special going on with her. When an animal is in need, she turns into Super Miss! It's the summer holidays and teacher Josje is looking forward to a few lazy weeks. Then it turns out that the mayor has plans to renovate the City Park, where her house is also located. He wants to replace the 200-year-old oak with 'New Nature'. The mayor is very proud of this technological tour de force. Although this fake nature can hardly be distinguished from the real one, Superjuffie soon discovers that it is poisonous. She has her hands full rescuing animals that have accidentally eaten it. How can she prevent the plans from going ahead?