Fansheng, who is only 17 years old, struggles every day in the shadow of the college entrance examination. At the same time, Youyou from hell finds her ideal replacement Yin Yang Hunter. Fansheng accepted this task for various reasons. With the guidance of Youyou and the help of the coming from hell who appeared one after another, can she complete this test perfectly? What kind of bizarre experience will happen to her after her life has undergone tremendous changes?