Thirty years after the strange disease caused by two mysterious stone discs tormented the Zheng family, clues began to emerge with the appearance of a book. The missing father, the strange corpse in the underground secret room, and the mysterious thief who appeared in the middle of the night forced the descendants of the Zheng family and their travel companions to embark on a long journey of exploration and arduous puzzle solving... The Qinghai-Tibet Plateau, a virgin land far away from the hustle and bustle, has mysterious legends unknown to the world, mysterious and strange cave ruins deep in the Bayan Har Mountains, unknown ancient villages hidden at the bottom of the lake, and underground rivers flowing for 25,000 miles. What secrets are hidden behind them? Why did Daxizhou sink? Why was the Mayan civilization lost? Who built the Egyptian pyramids? What mysteries are hidden in the terrifying Kunlun Hell Gate, Bermuda Triangle, and Naples' "Death Valley"? ... All the answers lie in the Plateau Code.