Gate of the Filial Daughter (1968)

Living alone with her father deep in the mountains, Bang-weol has grown up to be a spoiled brat. One day a woman arrives at their isolated house and stays with them. She is trying to hide away from the world because of her extraordinary beauty. Some men had followed her with the intent to rape her, but as they approach, they are struck down by lightning. Witnessing this, Bang-weol decides to learn what the woman has to teach