Forensic doctor Lin Jingxuan relied on his professional knowledge and tenacity to lead the "iron triangle" team (forensic doctor Lin Jingxuan, criminal profiler Su Wanqing, and criminal police officer Chen Nuo) to detect a series of bizarre murders. As the investigation deepens, the clues hidden behind the case point to the secret past of his late mentor Gu Mingyuan, and involve a huge conspiracy network headed by "Judge" Gu Yehua, who uses legal loopholes and psychological manipulation to carry out "lynchings." In the process of pursuing the truth, they not only have to fight against cunning and cruel opponents, but also face the abyss of human nature and the test of trust, and finally stage an ultimate showdown about justice and redemption in Jianglin City, where light and darkness coexist.
