A policeman in a small county town used his strong analysis and keen insight to solve various difficult cases step by step. He met outstanding criminal investigation experts and various high-IQ criminals from all over the country. Each case was like a difficult game, but Lin Yu relied on his wisdom and courage to overcome the difficulties time and time again and successfully solved one major case after another. He gradually became a dazzling star in the field of criminal investigation in Daxia, making steady progress towards the goal of "Daxia's No. 1 Criminal Investigation Police", and his legendary story.
