Wu Qi, a youth living in seclusion in the mountains, considers himself ordinary and enters the world to deliver a letter to fulfill a last request. Equipped with an absurd rebound passive, he dominates villains and forces enemies into paying for his schooling. After entering high school, he frequently creates heaven-defying iconic moments—blowing up the classroom with a talent show and lifting thousand-pound barbells. A returner determines he is the ultimate end-of-the-world boss, but he foolishly misidentifies classmates as the children of destiny, protecting them desperately. The Zodiac organization stirs up worldly conspiracies, and humanity's memories are brutally wiped. Only those who get close to Wu Qi retain the truth, and this youth who only wanted to live in peace becomes the sole hope to save the world.