In the ancient world of mountains and seas, Yunji, an orphan from the human race, was adopted by Yu Minguo, but he was always an "alien" because of his bloodline. In an accident, he obtained a mysterious brand in the ancient forbidden land - only by establishing a deep bond with the mountain and sea race can he borrow its power.
He embarked on a journey, met life and death friends across races, and practiced the "Way of Mountains and Seas" of understanding and coexistence.
At the same time, the talented and ambitious Emperor Hong of the human race is pursuing a bloody "evolutionary path": devouring foreign races to strengthen the human race. War breaks out and civilizations confront each other.
Yunji and his friends were forced to fight for protection. In the painful sacrifice and farewell, they gradually understood that some protection means eternal farewell.
When all the races of the mountains and seas make their final decision, the era of mythology comes to an end. The cloud traces imprinted on the back of the hand became the last memory and messenger between the two worlds.
This is a forgotten truth: behind the myth are choices on the crossroads of civilization, friendship between life and death, and a grand and eternal farewell.
