The film tells the story of the troubled life of Princess Deokhye, the daughter of King Gojong of Joseon, as the last princess. It is directed by director Heo Jinhao. Son Ye-jin plays the adult Princess Deokhye, Park Hae-il plays the role of an independence activist, and Kim So-hyun plays the role of Princess Deokhye in her teenage years. Kim Jae-wook plays Zong Mooji, the Japanese husband of Princess Deok-hye.