The story is about a maverick teacher in 2000, saying, "I want to be a teacher!" "started his teaching career. The childish and unreasonable teaching methods have affected countless students. From then on, he became the legendary ace baseball teacher Xu Lei! However, the road to becoming an "ace baseball teacher" does not seem to be so easy. The once beautiful lover suddenly turned into a little fat, and the originally handsome Leige also became a "vagrant" living on the street and never recovered. Under the coaxing and persuasion of the teaching director, he returned to Wude High School as a teacher and reorganized the dilapidated baseball team. In the face of the absence of news from his lover, the three meals of life, and the students making trouble one after another, Xu Lei shouted: I will not give up! Persistence is the most important lesson we teach our students.