The story takes place in a near-future city in 2040, where technology is advanced but people are alienated, and new types of high-IQ crimes occur frequently. The heroine Shen Wei, as a top psychiatrist in the industry (specialized in micro-expression analysis and criminal profiling), was involved in the judicial whirlpool due to a "psychologically induced suicide case" involving a powerful person, and she went head-to-head with the male protagonist Lu Yanzhi, the chief prosecutor known as the "Conviction Machine". Lu Yanzhi paid attention to the absolute closed loop of the evidence chain, and initially scorned Shen Wei's method of relying on "intuition" and "psychological deduction".
However, as the case progresses, traditional criminal investigation methods fail, and only Shen Wei can accurately predict the suspect's motives. The two were forced to cooperate, from testing each other's bottom lines to establishing absolute trust in the ebb and flow of cases. The main line runs through a series of socialist cases that seemed accidental but were actually well-designed. The two teamed up to uncover the huge network of psychological manipulation hidden under the bustling city, and finally found the only warm support in this cold steel jungle.