The Beginning of the Crime

In Haicheng Zhiyuan Middle School, Chinese teacher Chen Mingyuan fell from the rooftop on a rainy night. Everyone said it was suicide. Until Interpol Lu Wanqing discovered the cement powder in the nails of the deceased, There was a seven-minute gap between the fall and the suicide note, and a pair of high-end leather shoes that didn't fit. As the investigation deepened, she met Gu Shen, a calm and restrained mathematics teacher. Every clue he provided pointed accurately to Fang Jingshan, the person in charge of the school. Lu Wanqing gradually realized that behind this case lay a series of crimes spanning fifteen years. And she herself is also a pawn in the chess game. When memories are tampered with and the truth is buried, who is the real murderer?