A top student at the police academy suffers an accident that leaves his mind regressed. He becomes the village fool, a dimwit, and a street loafer, mocked by everyone.
After merging with Chiyou's bloodline and mastering the power of black iron, his mind recovers, and he subdues the strange beasts of the mountains and seas.
On the eve of the decisive battle against the myriad demons, he scatters all his divine power to quell the calamity. After the war, he gives up every prospect of advancement and volunteers to stay in the village, becoming its guardian for the rest of his life.
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