Chen Fugui is an office worker earning a monthly salary of 12,500, burdened with mounting debts and struggling to get by in a pressure-filled society. Then one day he is attacked by a demon—but this incident unexpectedly awakens a special system within him. The system's rule is simple: the more he is attacked by demons, the stronger his powers become. From that moment on, his life changes completely—from working just to survive to facing supernatural danger head-on in exchange for ever-growing power.