Three-year-old girl Zhou Qiqi was bound to a dragon-slaying mission in advance due to a system failure and was transported from her home to a different world. She used her innocent instincts to resolve the crisis and purify the evil spirit. On the way, she met the black magician Sera, the magic wolf grandmother Ophia, the three-headed dog Colin, the dragon mother and the young dragon Leon, and gradually learned that Dean Ted had been replaced by Mephistopheles a hundred years ago and was about to take Leon's body. Zhou Qiqi went on an adventure to obtain the Elf Fruit and revived Mother Dragon. Finally, at the academy, he poured Mephistopheles with Sanwu potion, forced him to swallow it with one punch, and knocked him back to his original form as a time traveler. Leon lost control and turned into a black dragon. Zhou Qiqi tapped the chain and the dragon turned back into a small dragon. The mission was completed.
