At the close of the reign of Sin the Great in Goguryeo (B.C.37-A.D.668), royalist Uso is executed by a false incrimination made by a treacherous retainer Yangsin and his sister Jangssi. His daughter becomes a royal concubine of King Nammu, and called Her Majesty Yeonghwa. She revenges herself on the party of Yangsin. After the king passes away, she makes his brother Yeonu accede to the throne and has the whole country under her thumb. But she has no child. When the king begets a son from another woman, she dies of jealousy at last.
Sorry, but for now we weren't able to find movies like Her Majesty Yeonghwa.