Xi, a poor student in an elite middle school, was cold, silent, suspicious, and fragile. During the intense period of his senior year of high school, he went out to write. He met Su Jin, a master's student at Tsinghua University. They met many times. It seemed destined that Su Jin even met Xi when he was a substitute teacher. When Su Jin got to know Xi, he also got to know himself, but he didn't understand that the strength hidden in this young man's heart was beyond his imagination... The writing style was cold and cold, but the content was not clear-cut, and tended to be a bit profound and philosophical.