Lin Yan is an ordinary restorer of ancient books in the city. During the day, he lives an ordinary life with broken pages in his studio filled with the aroma of old books. But he didn't know that the "Tomb Keeper" blood flowing in his body had already tied him to the opposite fate of the "Spirit Devourers" hiding in the shadows of the city.
A sudden theft of ancient books broke his peace - what was stolen was not only a priceless Tang Dynasty unique book, but also key clues that recorded the secrets of the bloodline of the "Mausoleum Keepers" and the weaknesses of the "Spirit Eaters". On the night of the incident, the grandfather who raised him disappeared mysteriously, leaving only a bronze talisman engraved with strange patterns.
In order to find his grandfather and regain the ancient books, Lin Yan was forced to awaken the sleeping blood power in his body, but found that this power was like a cage. Every time he used it, it would bring him one step closer to the limit of "inhuman". In the process of tracing the truth, he met Su Qingyuan, a mysterious woman who appeared to be a bar owner but was actually a "spiritual medium", and Jiang Chen, a self-proclaimed "archaeologist" who always provided information about the Soul Eaters at critical moments.
The three formed a temporary alliance and shuttled through the intersection of light and dark in the city: during the day, it was the bustling CBD and the library with a vast collection of books. At night, it was the Soul Eater clan's stronghold hidden underground in the old city and the ancient tomb ruins forgotten on the edge of the city. Lin Yan was fighting against the Soul Eaters who lived by devouring human souls while exploring the truth behind his grandfather's disappearance. However, he gradually discovered that his grandfather's disappearance was not an accident, and might even be related to the ultimate mission of the "Lomb Keepers" bloodline.
