Delivery boy Lin Hao discovered a mysterious door in a dilapidated rental house. Behind the door is the cyberpunk city "Abyss" with flashing neon lights and prosthetic bodies everywhere. He became the only person who could freely travel between ordinary reality and the gorgeous other world.
With this unique advantage, he returned to his old business: selling ordinary real commodities as "antiques" to future oligarchs, and using future black technology to solve real crises. Five-star reviews are the source of his strength, and the reputation of "Golden Lightning" quietly spreads in Abyss City.
However, as he traveled frequently, weird "coincidences" continued one after another: his vague childhood memories perfectly overlapped with landmarks in another world; his unintentional words could trigger a data storm in the entire city. That door seemed not to be a passage, but a mirror reflecting his heart.
When the crisis of reality and the survival of another world came at the same time, and when the enemies of the two worlds joined forces because of the secret of the door, Lin Hao was forced to pursue the truth. He follows the clues and goes deep into the core of the world. What he will eventually face is the ultimate answer that subverts all perceptions - about the origin of the door, about the nature of the world, and about himself.
