Fang Ling has been plagued by nightmares every day since he was a freshman in high school. After transferring to another school, terrible things happened to Fang Ling in just one semester. His former friend died in the same teaching building, with the same sentence: I will come to you! What secret does the strange boy Han Nuo have? There are too many questions that seem familiar. What is it that makes Fang Ling so worried...