Liao Xuebing (played by Lei Mu) is the head teacher of Class Two, Grade Two, Tulip School. He gets along well with his classmates and has always liked campus life. The new semester begins, and everyone is getting ready for the new campus life. On the day of the opening ceremony, bad news came from the school. The old principal, who had always been responsible for caring for the students, was replaced. The new principal delivered a speech, but was robbed of the limelight by Liao Xuebing's appearance. The school was originally dissatisfied with Liao Xuebing, who was quite popular among the students, and took this opportunity to dismiss him. In order to obtain higher profits, the Bei family, one of the school managers, even proposed to sell Tulip School. After some inquiring, everyone found out that Bei Xiaodan's uncle Bei Yongxiao (Miao Yuntong) was behind all this. Bei Xiaodan didn't want to see the Tulip School founded by her father being resold like this, so she begged Liao Xuebing for help. Liao Xuebing has been dismissed by the school and can no longer be a teacher, but he is worried about his students, and he promised Bei Xiaodan to keep the school, so he entered Tulip as a security guard