Matthew College, a famous school in the area, is caught in the wave of weeding out the weak and retaining the strong, from teachers to students. Lu SIR, who has mediocre academic performance, has been excluded for a long time and is on the verge of elimination; the class 5C he teaches is in conflict with elite students and is bullied. During the election of the student union, Sir Lu assisted the amateur cabinet "Knights of Immortality" headed by Xianzai and Zhuangzi, and successfully broke the monopoly of elite students. But at this time, another direct subsidy turmoil engulfed the teachers of different parties in the school.