Zhou Xingxing, the captain of the Flying Tigers, was ordered to secretly go to Shengyuqiang Middle School to find the pistol stolen by the headmaster during the visit. Although Zhou Xingxing was powerless in all aspects, he accepted the task. He quickly adapted to school life, and his kung fu skills made him popular with many students at school. Zhou Xingxing also took this opportunity to investigate the disappearance of guns.

Uncle Da is an undercover of the school police force. He was instructed by his superiors to assist Zhou Xingxing in handling the case. Later, he learned the news of arms smuggling and conveyed it to A Xing, but he was not caught by the arms smuggling boss. He was taken hostage in exchange for smuggling arms, and was finally rescued safely by A Xing.

Extended data:

Killer No.1 of the Flying Tigers (Stephen Chow) is sent by the director (Huang Bingyao) to the campus as an undercover to find the lost gun, while Uncle () plays the role of a worker to help. Zhou Xingxing doesn't want to go to school. It was not until he met He Min (Sharla Cheung), who was in charge of counseling, that he tried to become a leader among his classmates. Later, He Min discovered Zhou Xingxing's undercover identity and ignored Zhou Xingxing in a rage.

There are students in the school who associate with the underworld boss Fei Da (Roy Cheung). Zhou Xingxing learned that Fei Da was smuggling arms and transporting Fei Da's arms at night, but the tree was caught by Fei Da. The next day, Zhou Xingxing was asked to exchange arms for Dashu. Zhou Xingxing kept his promise, but he took the opportunity to set off the general's fire and flew into a rage, chasing Zhou Xingxing and Dashu to school.

As it happens, the students stayed at school to prepare for the celebration, and Fei Da held the students hostage to confront Zhou Xingxing. At the first opportunity, the director appeared and saved Zhou Xingxing and the students. Zhou Xingxing not only won He Min's heart in the end, but also got a promotion just around the corner.