In the near future, technology has advanced, but society is sharply divided by class, leaving the underclass struggling to survive. Lin Jin was one of them, until a global network failure set him on the path to invincibility! He wakes up to find that he has become a BUG in the system of humanity itself, able to break the rules of reality and move freely in the "Realm of Code." By modifying human genes, he gains superhuman abilities; by changing the code of objects, he can create all kinds of high-tech weapons. He clears one challenge after another, completing the various missions issued by the System as his strength skyrockets. The elites who once bullied him now kneel before him and beg for mercy. Powerful evil organizations and superpowered individuals alike fall to his intelligence and BUG abilities. Wealth and rare items keep pouring in. Watch as a young man from the bottom of society turns his life around and becomes the ruler of the world!