In 2007, multiple murders of female students occurred in M Middle School in Guangzhou, and the entire campus fell into panic. Zheng Yuyan, a senior high school student who calls himself a "campus fortune teller", is also involved. While everyone is wondering about the murderer's motives, the school's psychology teacher Jiang Ruanruan becomes the next target. Can Zheng Yuyan gain insight into the case and prevent the next victim from appearing?