Two new teachers have arrived at the No. 1 Middle School in the city. Lin Qinghan, aloof and taciturn, is praised as a model of "pure and pure", while Lu Yan, a warm-blooded and funny teacher, is a "treasure class teacher" in the eyes of students. The two became happy enemies due to their conflicting teaching concepts, but they were always forced to be bound by rumors and the calculations of hypocritical colleagues. Lin Qinghan seems to be passive, but in fact, he has already planned to expose the disguise of his evil colleagues and counter malicious rumors; Lu Yan's preference is never concealed, and the mysterious background seems to hide the mission of protecting her. When identity disrupts the plan, love and the "anti-routine" mission collide, the strategy script of Mr. Gao Leng does not follow common sense from the beginning.