A modern wise man traveled through the Warring States Period and became Xiao Yulin (Ying Chengyu), a young master of the Qin Dynasty who had been living among the people since childhood and had disabled legs. Fortunately, under the careful care of the beautiful lady Jiang Shihan for five years, he healed his broken body with his peerless acupuncture skills. He was a prophet of future generations and had insight into the national destiny of the Qin Dynasty and the changes in the court. By chance, he meets Ying Zheng, who is looking for his younger brother in disguise. He predicts the rebellion between Lao Ai and Lu Buwei with his astonishing ingenuity, sees through the hidden dangers of Xirong, hoards grains to develop businesses, cultivates dead soldiers, and builds magic soldiers. He plans step by step, stirs up the situation in the Qin court with his commoner body, assists his brother to clear up the troubled times, and rises from dormancy to determine the outcome of the Sixth Qualification.