When myths become reality, when legends become crises, a forgotten world is approaching us.
Archaeologist Lin Yu discovered an ancient stone wall engraved with strange animals from "The Classic of Mountains and Seas" at the foot of a hillside washed away by heavy rain. With one touch, he became the "Speaker" - the eighth human in three thousand years to understand the language of alien beasts. At this moment, he knew:
Strange beasts from the Book of Mountains and Seas really exist, and the parallel world they live in is on the verge of collapse due to the expansion of human civilization; the barrier between the two worlds is about to be completely broken, and the collision will bring unimaginable disasters; and the only key that can stop all this is the "Mountains and Seas" scattered in the world and divided into three parts.