Engineer He Min traveled through time to the end of the Qin Dynasty. At this time, the war machine of Daqin was coming to an end, and society began to idle. After the death of the ancestral dragon, Li Si, the head of the Legal family at that time, was obsessed with the struggle for the throne of Qin Ting and ignored the resistance under the pressure of the people. He Min's time travel directly spread modern diseases that were two thousand years ahead of evolution to classical society, causing the famous plague in the late Qin Dynasty. He Min used modern medical knowledge to save people everywhere. At this time, his medical skills were appreciated by the Mohists who had been suppressed by the Qin Dynasty, so they invited He Min to treat the disease for the giants of the time, but there was no way to save it. When the giant was dying, he heard He Min telling the story of the benefits of modern social technology to people, and finally left with a smile. He Min was given the title of tycoon, and He Min was ordered to lead the Mohist remnants and plan to rebuild their homeland.
During the struggle for the throne, all ten of Zulong's children were killed, and the eldest son Fusu was ordered to commit suicide. Chu's plan to reform Qin finally went bankrupt. Xiang's uncles and nephews gathered their strength and waited for the opportunity to launch an army.
The garrison soldiers screamed, and the letter was lifted up, and the world was in chaos. At the end of the Qin Dynasty, the war for the restoration of the kingdom was raging. He Min and the Mohist family, who lived in seclusion in the mountains, were dragged into troubled times by the times. They are wandering around in the world carrying the sharpest butcher knife of Mohism and the most powerful medicine for governing the world. They love each other without attacking, and the ideal of equality for everyone has never been buried.