The fictional world based on "The Classic of Mountains and Seas" has a special passage connecting the human world with the secret realm of mountains and seas. The time is set at the end of the ancient dynasty when plague and war were intertwined.
- Human beings obtain the five elements of spiritual power through practice. Spiritual power with different attributes has special effects when fighting against specific monsters. The strength of the spiritual power is related to the user's character.
- There is a spatial dislocation phenomenon in the secret realm of mountains and seas. The activity areas of monsters will shift with the changes in the positions of the sun, moon and stars, and special instruments (such as astrolabes) are needed for positioning.
Protagonist: Yun Yi accepts a mysterious commission and escorts a bronze box engraved with runes into Qingyao Mountain. On the way, he is attacked by a Gu carving that can control sound waves, and discovers that his father's relics are hidden in the box.
- When crossing the burning wasteland, he was besieged by a group of fire monsters. Yun Yi used water spiritual power to resist but triggered a flash flood. At the critical moment, A Yuan used wood spiritual power to weave a vine net to save people.
-In the plague swamp created by the beast, A Yuan was eroded by the miasma in order to save Yun Yi. Yun Yi used the pharmacopoeia left by his father to prepare the antidote, and the two developed a subtle relationship.
