- Director: Jo Chul-Hyun
- Producer: Oh Seung-Hyun, Sung Chang-Yeon
- Cast: Song Kang-ho, Kim Joon-Han, Park Hae-il, Cha Rae-Hyoung, Jeon Mi-sun, Yoon Jung-il, Keum Sae-rok, Tang Joon-sang, Im Sung-Jae
Sejong was the 4th King of the Joseon Dynasty and the discovery of Hangeul, the Korean alphabet is one of the items that is often used and famous. The film begins with a man named King Sejong (Song Kang-ho) trying to create a new, easy and also simple alphabet for his people.
But King Sejong had to face difficulties in designing a new set of phonetic letters from offsets. Meanwhile, the Joseon literary elite, such as scholars and also Korean Confucian politicians, strongly opposed the move of King Sejeon, claiming that the discovery might challenge the Chinese world order.
Where before the discovery of hangeul, the Koreans used a Chinese writing system which was difficult to learn by the lower classes. Meanwhile, a man named Monk Shinmi (Park Hae-il) appears before King Sejeon. Monk Shinmi is known as the best phonologist in the whole kingdom and also Monk Shinmi is an eccentric Buddhist priest to be a key assistant to King Sejeon's plans.
Together with his students and also the son of King Sejeong, Monk Shinmi led the project to be able to create a new phonogram adapted to Korean through learning other phonetic letters such as Sanskrit.