Based on the life of Empress Myeongseong (1851 - 1895), the first official wife of King Gojong, the 26th king of the Joseon dynasty. She was killed on October 8, 1895 by Japanese assassins.

A contract killer becomes disenchanted with his line of work and spares the lives of his two latest would-be-victims. But the assassination company he works for has no intentions of letting him quit.