Su Che, a top student in the Department of Archeology, just wants to graduate peacefully, but is accidentally recognized by a "Zhong Kui tattoo" and forced to join the mysterious organization hidden in the shadows of the city - the Modern Demon Slayer Division.
Here, rune bullets are used to slay demons, and big data modeling is used to eliminate demons. While his colleagues were practicing spells, Su Che took out the analysis report: The fluctuations of the demonic energy conformed to the Fibonacci sequence, and the evil spirit's weakness was actually infrasonic frequency? He used scientific thinking to deconstruct metaphysics and used archaeological knowledge to crack evil formations, becoming the most unconventional trump card in the department.
However, as the investigation deepens, the truth about the disappearance of his parents, the shocking conspiracy of the "Seance", and the ultimate secret of his own tattoos have emerged one after another. When the ancient demon is about to resurrect and the whole world is in danger, Su Che faces the final choice: follow the ancient precepts of the Demon Slayer Division, or break the rules and use his own way to establish a new order for the world?
This is not only a collision between science and metaphysics, but also a trial about protection and choice.