Village in the Mist (1983)

Su-ok (Jeong Yun-hee) is sent down from Seoul to teach at an elementary school in a remote mountain village. She sees a shabbily-dressed man named Kae-chul (Ahn Sung-ki) at a bus stop near the entrance to the village, and gets a sinister feeling about him. (koreafilm.org)
AKAs: Angae maeul, Village of Haze
Country: South Korea
Directed By: Kwon-taek Im
Written By: Kil-han Song, Mun-yeol Lee
Starring: Sung-Ki Ahn, Dong-joon Choi, Nam-kyeoung Cho