In the ninth year of Zhenyuan of Dezong of the Tang Dynasty, thirty years after the Anshi Rebellion was put down, the Tang Dynasty turned from prosperity to decline. Shen Qingya, a minor official at Honglu Temple in Chang'an, was forced to flee the world with half of the fragment of "The Map of Huayi in the World" because his mentor Jia Dan was assassinated. This panoramic map of the Tang Dynasty that Jia Dan painstakingly drew contains the three million Minzhen treasury silver hidden during the Anshi Rebellion, the "Thirty-Six Secret Roads" that run through the entire Tang Dynasty, and the ultimate secret of the "Twelve Prefectures Suppressing the Dragon Bureau" during the Wu Zetian period - enough to reverse the fate of the country and overturn the court.
On the way to escape, Shen Qingya met and formed an alliance with Pei Shuang, the descendant of the Pei clan in Hedong under the pseudonym Aman, Su Luo, a Persian intelligence dealer, and Qin Tieshan, a veteran of Shuofang Army. The four of them walked from the underground undercurrent of the West City of Chang'an to the sunset of the lonely city in the Hexi Corridor, crossed the Taklimakan Desert to Qiuci in Anxi, and paid homage to the iron-blooded prince Guo Xin who was holding on with white hair; they went south along the Shu Road to meet Wei, the god of war in the southwest. The Gao army defeated Tubo, sailed eastward along the Yangtze River to expose the secret war on water transportation in the south of the Yangtze River, sailed to the deserted islands in the South China Sea to track down the town's treasury silver, and finally sneaked into the tiger's den of Longtan in the third town of Heshuo, and collected eight fragments to piece together the whole picture of "Hua Yi Map".
During the eight-year journey of thousands of miles of mountains and rivers, they not only had to fight against the step-by-step pursuit of Dou Shen, the powerful minister of the dynasty, the strife in the court of Lieutenant Ju Wenzhen of the Shence Army, the ambition of Huaixi Jiedushi Wu Shaocheng, and the frontier cavalry of the Tubo Prime Minister Shang Jiezan, but also faced the Anshi Remaining Party's conspiracy to restore the country that had been hidden for thirty years. When the complete map reappears in the world, when the town's treasury silver comes to light, and when the secret road runs through the country - the fate of the Tang Dynasty is tied to the hands of these four little people.
