Lin Yuan is an ordinary boy in a border town. His only secret is the golden lines on his arms.
The ruins outside the town are expanding. The villagers said that it was a rift of chaos, and the people who entered it never came back.
Until that day, the World Eater came. They said they wanted to break the seal of the sky and let the Xuyuan swallow the continent.
The crazy old beggar held Lin Yuan's shoulders: "You are the last descendant of the Guardian."
"What do you mean?"
"It means - your blood can repair the seal."
"What happens after you finish it?"
The old beggar said nothing.
But Lin Yuan heard the last voice of the previous generation of boundary defenders from the reverberation at the edge of the Xuyuan:
"Don't learn from us... Don't burn yourself out."
Yue Qingqian, the saint of Tianji Pavilion, stood beside him, watching this young man, who was not even in the Qi Gathering realm, walking towards the sealing node alone.
She asked: "Why do you want to keep it?"
Lin Yuan turned around and smiled:
"Because if I don't keep it, she has to keep it."
"Who is she?"
"My sister, the one herding sheep by the ruins."
The World Devourer said that by breaking the seal, one can gain power beyond all else.
But Lin Yuan just wanted the girl herding sheep to go home safely tonight.
This is the story of a boundary keeper.
Not because he wanted to be a hero, but because it was his turn.