“The culprit who is posing as a royal official is not stealing wealth. He is stealing the hearts and minds of your people, Your Majesty.” There was a divisive figure in the Joseon Dynasty who was a hero to the people but an enemy to the establishment. His name was Hong Gil-dong. King Yeonsangun had royal lineage but was reviled by his people while Hong Gil-gong was born as a slave but succeeded in winning over the hearts of the commoners. The struggle between these two men demonstrate the qualities that a true leader needs. This TV series portrays the life of Hong Gil-dong who survived in a hostile and tyrannical kingdom as he waged a fight against the powerful elites.