In the fifth film of McDull, Springfield Flowers Kindergarten encountered unprecedented financial difficulties. Even though the principal (voiced by Anthony Wong), Teacher Chen (voiced by Xu Fei), and parents such as Mrs. Mai (voiced by Sandra Ng) tried their best, they could not solve the problem. So the school held an alumni fundraising party, but the alumni who grew up had no future. Fortunately, the principal accidentally discovered the musical talents of McDull and other children. After setbacks, the principal finally found a plastic brand manager (voiced by Zheng Zhongji) to take care of the affairs of the children's choir, and the performance was a great success and announcements continued. Unfortunately, the manager disappeared at the last minute, and the choir did not bring much profit to the school. But the principal found a surprise in the last performance. There are still successful alumni in Springfield Flowers Kindergarten, and the alumni once again felt the true meaning of life.