All greed is the beginning of evil. The school is the sanctuary of education, but under the drive of benefits, it has become a veritable hell on earth. Teacher was originally an engineer who had transformed the human soul, but became the murderer of the children...No. 1 High School was the national college entrance examination champion's base. Every year, the teacher in charge of senior year (1), Teacher Gu, would bring the students to the academy to carry out their demonic closed study. Every year, there would be students who could not bear the burden and went crazy. The new College Entrance Examination has created the history of No.1 Middle School. Just as the school prepared to host Teacher Gu's celebratory feast, Teacher Gu suddenly disappeared …A few years later, Xie Ke, a handsome male teacher, came to the classroom of a senior in high school. He was secretly adored by a beautiful and gentle girl. With an uneasy mood, Xie Ke led the students from Grade 3 (1) class into a courtyard known as the "Fierce Room" for closed study. However, on the very first day they entered the courtyard, the mysterious and mysterious Teacher Gui appeared. From then on, Xie Ke and Quiet had entered into a life of horror and terror.Can you sell your soul in exchange for real demand? Can giving up faith really be exchanged for greed? Will Xie Ke and Jing Jing be able to escape the deadly curse in the end?