A romantic comedy historical drama about a woman who accidentally becomes a thief and a great Joseon army that is chasing her, whose souls switch and they save and protect each other. Hong Eun Jo is a girl born to a noble father and a slave mother. Eun Jo, also known as 'Hong Gil Dong', is a righteous thief who steals from corrupt officials' granaries for the people, hiding the fact that she is a woman and living amidst loud rumors. Prince Do Wol Lee Yeol has outstanding looks, a tall figure, and innate dignity. Lee Yeol, who enjoys detective investigations, is someone who falls in love with Hong Eun Jo at first sight while searching for Hong Gil Dong's true identity with his brilliant mind and transforms into a straightforward man.