After transmigrating, Chen Xia awakens an Immortal Longevity System that grants him one attribute point for every year he survives, which he can freely allocate to strength, magic power, or fortune. At the very beginning, he witnesses an immortal wipe out an entire city with a single palm strike. He immediately decides to lie low and grow stronger in secret, retreating to a remote border town to work as a low-ranking constable. Over a century, he quietly accumulates attributes, slays bandits, eliminates demonic flood dragons, and defeats cultivators from immortal sects, growing stronger without anyone noticing. When a world-ending giant hand descends upon the world once more, everyone finally realizes that this seemingly ordinary man hidden among the common folk has long since become invincible.