shingen yamazaki is a high ranking general of the sengoku era, that time there is a huge war between the Japanese empire and the Han empire

eventually, the Japanese empire was weaker than the han(Chinese) empire. So he was held hostage at the forbidden city(royal palace)

while staying there, shingen was placed to work at chuxiu palace of emperial Noble consort Chun.

he was treated like a fool until consort chun takes him to her palace, he can't beat up the palace guard even though he's stronger since he would get beheaded and the Japanese emperor couldn't save him if that happens.

he ended up falling in love with consort chun or Hitara Erqing, the favourite concubine of the han emperor.

consort chun eventually had an affair with shingen, both loves each other deeply despite knowing that they will never be together.