Late 18th-century Joseon dynasty. The King is beleaguered and surrounded by traitors of the ruling elite. They plan to assassinate and replace him with a puppet. But the King has some aces up his sleeve that may help him defeat them all.
During the Japanese occupation of Korea, the Japanese Empire seeks to eradicate the Korean language and identity. In retaliation, a small group of Korean patriots try to protect their language by compiling the first Korean language dictionary.