While visiting the Terracotta Army, He Qi is struck by lightning and sent back to the Great Qin dynasty, bringing along a smart smartphone with internet access. Right from the start, he points at Mount Li and tells Emperor Qin Shi Huang, "Your Majesty, this is your imperial mausoleum!" Using the phone, Ying Zheng discovers the fate of the Qin dynasty, which is destined to fall after just two generations, and learns about two thousand years of China's rise and fall. Determined to change this fate, He Qi presents miraculous treasures such as potatoes and corn, revolutionizes papermaking, establishes the "Heaven and Earth Society" to train Fusu through practical experience, and recruits members of the Mohist and Agricultural schools. With black powder and technology far beyond its era, he assists Emperor Qin Shi Huang in embarking on an entirely different journey of conquest.