Royal Secret Agent

Set in the Joseon period, the series revolves around Sung Yi-gyum (Kim Myung-soo), a state examination top scorer who works in the administrative and research department of the government office. He is caught gambling and as punishment, he is reassigned to a new position as a secret royal inspector to investigate the corrupt practices of public officers. Yi-gyum carries out his new job with the help of Hong Da-in (Kwon Nara), a female inspector, and Park Chun-sam (Lee Yi-kyung), his talkative but affectionate servant.