In the early days of liberation, everything was in ruins. Yu Guodong, leader of the People's Liberation Army's "Tiger Regiment", and political commissar Xu Feng were injured and transferred to other jobs and served as principal and party branch secretary of Tianzi Middle School in Tianzi County.
Faced with a shortage of teachers, poor conditions, and a dilapidated campus that had been ravaged by war, Yu Guodong and Xu Feng carried forward the brave and fighting spirit of the "Tiger Regiment", learned by doing, learned by doing, and followed the "Three Major Disciplines and Eight Points of Attention" in every word and deed, winning the support of teachers and students in the school. From struggling to restore the school to doing everything possible to run a good school, Tianzi Middle School has grown rapidly. It has become the only key middle school in the county.
When everything goes smoothly, something unexpected happens: one night in the girls' dormitory of Class 2, Grade 3, a masked man suddenly sneaks into the dormitory and attempts to rape Lu Yufen.
Through internal and external investigations, Yu Guodong believed that an insider was responsible, but there was no conclusive evidence. But he didn't give up and was determined to dig out the devil. What the outcome will be will be revealed after reading the novel.