After the King of Qin unified the six kingdoms, he wanted to live forever. According to legend, he sent tens of millions of troops to cross Fuso (Japan) eastward. This was not to refine some elixirs, but actually to gain access to people's eyes and ears, he built plank roads openly and secretly visited Chencang. His real goal is to get the dragon armor. After getting the dragon armor, King Qin can live forever, but at the same time, he also needs the blood of a person, that person is called Ye Zifan, and Ye Zifan's mother is a dragon who fell from the fairy world to the underworld.