Dong-hyuk Hwang

Kang In-ho (Gong Yoo) is the new arts teacher at the Benevolence Academy in the fictional city of Mujin, North Jeolla. He has a dark past - his wife was a high school student who committed suicide and his daughter is under the care of his mother. In-ho is hired to teach deaf and dumb students in school but he soon discovers a dark secret that lurks among the students and the faculty. (Wikipedia)

In 1636, the Qing dynasty attacks Joseon. King Injo and his retainers, including Myung-kil Choi and Sang-hun Kim, hide in the mountain fortress city of Namhansanseong. They are isolated from the outside. Meanwhile, Myung-kil Choi insists that they enter into negotiations with the Qing dynasty, but Sang-hun Kim proposes that they keep fighting. (imdb)