In 2023, in the "Shiyi Pavilion" antique shop in Laomendong, Nanjing, 19-year-old Lin Yanqiu has been able to understand animal whispers since he was a child. This secret was completely broken when a dying black fox broke in. The bronze token around the neck of the mysterious fox is engraved with a mixed pattern of cuneiform and oracle bone inscriptions. One side is the Ouroboros in Western mythology, and the other side is the ancient Yinglong from the East. This "Xuanzhujian" is the key to connect the Chinese and Western mythological worlds.
The mysterious girl Su Mo appears with a "beast hunter" who tracks the mysterious fox. Her family has guarded the "Mysterious Beast Directory" for generations. The directory records the nine "cross-domain mysterious beasts" sealed by Dayu when he was controlling the floods - they are not only exotic beasts in the "Book of Mountains and Seas", but they are also inextricably linked to Greek mythology and Nordic mythology. Now that the seal has been loosened, the mysterious beast's movements have triggered a series of bizarre events: "Red Rooster" with shark-like characteristics appeared on the beach of Qingdao, the "enlightened beast" in the Dunhuang murals wandered in the Mogao Grottoes late at night, and the "Fenrir" cub in Nordic mythology was captured in the Qinling Mountains.
