Lu An, a useless student recognized by the whole school, has a super transformation system from the future hidden in his body, but this system is actually a trap of a mysterious organization. When the organization sends a genius to humiliate him, Luan activates the system's hidden power: devouring other systems. He uncovered the truth step by step and found that he was designed to be the weakest system owner, just to cover up that he was the nemesis of all systems. In this world where the jungle prevails, he chooses to protect ordinary people who have been abandoned by the system, but his heart is gentler than anyone else.