“Lee Mong” is an espionage melodrama that takes place in Gyeongseong (now known as Seoul), Manchuria, and Singapore during the Japanese colonial occupation. Lee Yo Won will play Lee Young Jin, a Joseon (Korean) surgeon who has been raised by Japanese parents. Yoo Ji Tae plays Kim Won Bong, the leader of a secret society fighting for Korean independence. The two characters become undercover operatives for the Korean provisional government based in Shanghai.