The dead souls are bathed in blood and destroyed by heaven and earth. Mathematics idiot Meng Xiaoqi gets a dark red book. A masked boy who calls himself Ye says "nine" to her. The appearance of the mathematical genius Yun Tianying symbolizes whether the undead code of the future can be deciphered. Who can escape the fate of "nine"? The final ending of "Ann's Notes". "Let's play a game"