The Piper (2015)

South Korea after the Korean War. A father and also a musician is traveling with his son through the country to find a new home. They arrive at a remote village in the middle of the mountains. Though the people are polite, they seem also afraid of something. The father decides that they stay at night, because he thinks that they are just superstitious. But it turns out that the villagers are afraid because of supernatural and very deadly reason.

– Original title: Sonnim