Observation

This film is set in the early Joseon era, joking about the history of the Joseon king's usurpation of the throne. Kim Nai Kyung (played by Song Kanghao), a descendant of a rebellious minister, has the ability to recognize people by face recognition, but due to his humble status, he can only live in seclusion in the wilderness with his brother-in-law (played by Cho Jung-seok) and his son Jinhyung (played by Lee Jong-suk). The proprietress of the largest brothel in Hanyang (played by Kim Hye Soo) made a special trip to visit Jin Naijing and persuaded him to go to Hanyang to make money by looking at fortune telling, but Jin Heng did not understand him. After arriving in Hanyang, Jin Naijing worked step by step, made a lot of money and was appreciated by his loyal minister Jin Zongrui (played by Baek Yoon-sik), and even gained the king's trust. However, due to his outstanding talent, Kim Nai Kyung had to get involved in the battle for the throne between the king's younger brother Suyang Dajun (played by Lee Jung Jae), and also implicated his son Jinheng who had changed his name and won the top prize. Jin Naijing decided to help Jin Zongrui and the young king destroy Lord Shouyang's conspiracy, but he could see through people's hearts but could not decide people's fate. The torrent of history is still flowing.