Noon and Midnight (1970)

Helene and her boyfriend come to visit their friend Lawrence in his family home. Once arrived at the house, a large stone building lost in the mountains, the couple is greeted by father and daughter, both dressed in white mysteriously. The next day, the couple is about to leave, Lawrence finally makes its appearance. Young people are invited to stay. But during their stay, inexplicable murders occur. Helen is determined to uncover the truth ...