You are a new teacher at Yusong Vocational School, you are a teacher who will change a school that is full of violence to become a good school again, the school is in trouble because one child is under the leadership of White Lead, his powerful father makes him an arrogant and cruel person, sometimes people also call him a blue-haired psychopath, his name is Minhwan

when you wanted to propose a disciplinary committee to expel Minhwan, the vice principal had forbade you but you had promised to the student who was being bullied by Minhwan, one night you forgot to bring the file regarding the testimony of the student who was being bullied so you went back to school and there was a detective watching from outside the school, when you got the file you intended to go back home but the lights were turned off and Minhwan appeared carrying a gun and several of his men, this reminds you that he once killed a teacher who wanted to submit a disciplinary committee too but you can't lose to him

"surprise" said Minhwan appearing from the hallway