The Ancient Books Department of the Municipal Library suddenly trembled, and dark purple gaps opened in the sky. Countless magically modified "mountain and sea beasts" poured into reality: three-toed sharks wearing Nike shoes, crocodiles with bomber wings, mechanically spliced Qiongqi... They tore up billboards, polluted rivers, and impacted the city with their twisted shapes and violent logic.
Young Lin Xiaoyi unexpectedly awakens the authentic copy of "The Classic of Mountains and Seas" left by his grandfather. Strange beasts in the book - Nine-tailed Fox, Bi Fang, Zhulong and others appear one after another. These creatures that carry the wisdom of the Chinese ancestors are not the ferocious monsters in legends: the nine-tailed fox resolves illusions with wisdom, the fire of Bi Fang warms rather than destroys, and the candle dragon opens its eyes to illuminate the tampered history.
When the modified monsters try to drown the cultural authenticity with the torrent of information, and when children begin to imitate weird symbols and meaningless roars, Xiao Man fights side by side with the ancient book administrator Old Uncle Zhang. They discovered that this confrontation was not only a contest between alien beasts, but also the protection of cultural roots: the "fierceness" of China's alien beasts contained warnings, the "oddness" contained awe, and the "spirit" was passed down for thousands of years.
From libraries to playgrounds, from city skylines to ancient ancestral halls, in the collision of truth and fiction, children gradually understand that the real "Classic of Mountains and Seas" is never a horror story, but a torch passed on by ancestors to future generations, illuminating the truth that "all things have animism and culture has its source".