In Longyuan City, where aura technology is intertwined, the chief criminal investigation expert of the Detective Agency [Jiang Xuan], a former martial arts genius who has self-sealed his "emotional perception" for special reasons but possesses near-absolute sanity and super-powerful "aura analysis" powers, was accidentally involved in a bizarre murder case. The deceased was a highly respected senior member of the "Martial Arts League", and the strange "martial arts mark" left at the scene pointed to a taboo experiment that had been sealed for many years.
As the investigation deepened, Jiang Xuan discovered that he was not only the solver, but also the prey. The former comrades-in-arms, the mysterious plutocratic daughter, the secretive director, and even the chairman of the martial alliance are all shrouded in mystery. Behind each seemingly independent murder case, there is actually a shocking conspiracy to subvert the federation and pursue the "ultimate martial arts".
When cold logic encounters the abyss of human nature, and when the power of martial arts becomes a tool for killing, Jiang Xuan must face the pain sealed in his heart, temper the long-dormant "martial heart" in a desperate situation, and use wisdom and strength to cut through the many shady curtains shrouding Longyuan.
