I Use My Psychic System to Become a Master Detective!

Song Yang is a newly appointed homicide investigator in the quiet, remote Kang County, where crime is virtually nonexistent. Despite holding a rare position as one of only two homicide investigators in his community bureau, his days are filled with trivial pranks and elderly residents seeking companionship rather than justice. Unbeknownst to his colleagues, Song Yang possesses a supernatural "Detective System" that he has waited years to utilize since passing his exam. The system remains dormant until a high school student, Mu Wanqing, reports her best friend Feng Zhizhi missing. Mu Wanqing describes a bizarre sequence of events involving a divination that predicted a parrot, a strange "spirit photo" sent by Feng Zhizhi moments before she vanished, and the subsequent discovery that Feng Zhizhi’s home had been demolished. Song Yang dismisses the report as a prank due to the lack of a system prompt, but his attention is immediately diverted when a murder alert triggers the system.

The case unfolds at Kang County No. 1 High School, where Chen Feng, a Nobel Prize-winning physicist renowned for proving the existence of dark matter, has been murdered in his dormitory. The crime scene is grotesque: Chen Feng’s head has been severed and hung from the ceiling, while the room is filled with esoteric items such as Japanese amulets, rune stones, and a broadsword covered in fingerprints that do not belong to the killer. Forensic analysis reveals a shocking discrepancy: the head found at the scene does not belong to Chen Feng. Furthermore, the victim’s body shows signs of rapid dehydration, resembling a mummy, and an artificial wisdom tooth has been forcibly extracted. A death message, the word "KEY," is discovered written in blood on the floor and carved into the scalp of the unidentified first victim.

As the investigation intensifies, the identity of the first victim is revealed to be Feng Zhizhi, Chen Feng’s daughter, who had been reported missing days earlier. This connection transforms the case from a simple homicide into a complex web involving family secrets and the professor’s controversial research into verifying the existence of the soul through dark matter. Song Yang encounters Jiang Ge, a tenacious reporter from the local newspaper with a contentious history with the police. Jiang Ge provides Song Yang with a USB drive containing secretly recorded footage of the murder. The video captures the killer, clad in sacrificial garments, stabbing the unconscious professor and decapitating him, while muttering the phrase "It must be done." During the viewing, Song Yang hears a mysterious voice in his mind, confirming his system is active.

The narrative takes a critical turn when Song Yang deduces that the man killed was not actually Chen Feng, but an imposter, based on the timeline inconsistencies and the professor’s continued public appearance after the alleged time of death. He confronts Jiang Ge with this theory, suspecting she is hiding the professor’s true whereabouts. Meanwhile, the investigation team struggles with the lack of fingerprints and the surreal nature of the crime, which blends scientific ambition with occult rituals. Song Yang’s unique ability to perceive clues through his system becomes his primary asset as he navigates a case that threatens to unravel the peaceful facade of Kang County, linking the murder to a deeper conspiracy surrounding the nature of reality, the soul, and the dark matter research that made Chen Feng famous.

The story progresses as Song Yang delves deeper into Chen Feng’s past and his controversial theories, realizing that the murder is not merely an act of violence but a ritualistic execution tied to the professor’s life work. The disappearance of the real Chen Feng adds a layer of urgency, as Song Yang must determine whether the physicist is a victim, a conspirator, or something else entirely. The presence of the "KEY" motif and the specific extraction of the artificial tooth suggest that the killer is seeking a specific secret or object hidden within the professor’s research. As the investigation team closes in, Song Yang finds himself at the center of a conflict that transcends ordinary criminality, forcing him to rely on his system and his own instincts to uncover the truth before the killer strikes again or the secret of the soul is lost forever.