During the Daye period of the Sui Dynasty, Yang An traveled through time to the amnesiac only son of a wealthy businessman named Yang outside Luoyang, the eastern capital. In order to hope that his father will become a dragon, Yang An worked hard. "Dad, the world is going to be in chaos. The emperor's personal expedition to Goguryeo will be defeated. We must prepare for the rebellion early." "Dad, this is the latest gunpowder developed by the child. How about you use it to compete with Li Shimin for the world?" "Dad, Qin Qiong, Li Jing, Yuchi Gong, these people are all talents. You have to make good use of them."
