In the near future, 2048, quantum technology makes a breakthrough, and humanity begins to master consciousness uploading and travel between parallel worlds. But the technology is monopolized by a secret organization. The world's three major quantum hub cities are "New Tokyo," the Asian quantum research center; "Deep Blue Harbor," an underground technology city in North America; and "Eternal City," a secret base in Antarctica. The story spans all three locations, concealing a "mirror world" built by the quantum network. Core technologies include quantum resonance devices that can activate hidden quantum nodes in the human body, consciousness-fragment recombination technology, parallel-world disruptors, and nanoscale surveillance organisms disguised as dust.