In 1841, Emperor Minh Mang, the second king of the Nguyen Dynasty passed away, passed the throne to Truong Khanh Cong, and later the Emperor Thieu Tri. From here also began seven turbulent years with many scramble for the position of harem. Phuong Khau is a pure Vietnamese fighting film based on real anecdotes in the Nguyen Dynasty. The film story revolves around 7 years of the reign of Emperor Thieu Tri with the main character, Pham Hieu Nguyet, taking a prototype from the Emperor Tu Du, the queen in Vietnamese history.