In ancient times, floods flooded the world and everything was out of order.
Dayu used the sacred trees of the four directions as the base, the spiritual veins of the Nine Provinces as the ink, and half of the divine soul as the pen. He wrote the book "Mountains and Seas" and reached an agreement with some gods. With their help, he sent the world's strange beasts and races, ancient gods, mountains, rivers and seas into the book. He used the Jiuding as the anchor and the scroll as the chain to isolate the human world from the world of mountains and seas.
Thousands of years later, Lin Yan, the successor of the scroll, in order to reverse the case of his parents, set foot in a world that only existed in myths and legends...