Pursuing the Crime of Reasoning

My name is Ye Tian, ​​25 years old, and I am an urban police officer. Because of my high crime detection rate, I was fortunate enough to be assigned to work in City A as a team leader. Here I met Chen Wen, the leader of the second team, and He Xin, who is good-looking and responsible. It was not peaceful when I was transferred to City A. The successive murders made me confused. The cruel, mysterious and confusing cases made me go deeper step by step. With my persistence, little doubts surfaced. Can I finally get the entire case restored? So let's start from the beginning.