Gao Ruofei (played by Zhang Zhikang) is an abandoned baby adopted by Lao Gao (played by Wu Ma) many years ago. The head teacher, Teacher Chen (played by Wei Yi), has always been regarded by Ruofei as the butterfly goddess in her heart. Ruofei likes a butterfly brooch of Teacher Chen very much. Teacher Chen notified Ruofei to participate in the parent-child sports meeting at the school. He stole the butterfly brooch and was discovered by his father. Unexpectedly, Lao Gao was furious when he saw the butterfly brooch. The aggrieved Ruofei ran away from home after arguing with Lao Gao. While running, he traveled to the Republic of China period, where a unique sports meeting was being held. There, Ruofei met Teacher Yang, who was very similar to Teacher Chen, and Dulong (played by Lu Yi), a Northeast Army soldier with strong martial arts. The rich young master Jason (played by Peter Ho) returned from the United States specifically to win the national martial arts championship in the sports meeting. He regarded Dulong as his biggest competitor. Ruofei admired the heroic Dulong and stayed with him all the time. As the two gradually became familiar with each other, Ruofei discovered an amazing secret...