Nae-kyeong is the greatest face reader Joseon has ever known. He can see through people by looking at their faces. He lives with his son Jin-hyeong and his brother-in-law Paeng-heon in the mountains. After alluring courtesan Yeon-hong proposes an offer, he moves to Hanyang to read faces in the courtesan house. Nae-kyeong quickly becomes the go-to face reader in town and even Vice Premier KIM Jong-seo hears about the new face reader. He appoints Nae-kyeong to governments Inspection Board. During his inspection, Nae-kyeong finds out about Prince Su-yangs plan to take the throne of his nephew. He decides to change the destiny of the country by changing whats written on Su-yangs face.