The protagonist Shen Mo is an ordinary administrator of the city museum with a withdrawn personality. Three years ago, due to an accident, he gained the ability to "check in" next to antiquities or monuments that contain "Taoist charm". This kind of check-in is not a system, but a resonance of spiritual and historical marks, which allows him to understand the fragments of martial arts of ancient strong men. In order to explore the truth about his abilities and heal the trauma of the year, he silently signed in the museum for three years, and his strength was unfathomable.
However, the entry of a mysterious "living" cultural relic into the museum broke his peaceful life. A huge world of martial arts hidden beneath the surface of modern society - the "Hidden World" - has surfaced in order to compete for this cultural relic. Silence was forced into the whirlpool, and his identity as an administrator became his best disguise. While playing the role of an ordinary person, he quietly "checked in" in the forbidden lands and ruins competed by major forces to gain stronger power. The highlight of the main plot is that the protagonist completes the check-in in desperate situations and in places that everyone thinks is impossible. He appears on the most critical occasions as an "administrator" or a "passer-by" to subvert the battle situation. However, the major forces have never been able to pinpoint his true identity. They can only guess based on clues that he is a "Lord of the Forbidden Land" who has lived for hundreds of years, thus triggering a series of misunderstandings and games full of suspense and contrast. In the end, Shen Shen will reveal the ultimate secret of the decline of the "Hidden World" and the dissipation of Tao Yun, and face the mastermind behind his own tragedy.
