As the astronomy club sets out on a mountain excursion, their bus breaks down, leaving the students and their teacher stranded until a remote village offers them shelter for the night. What begins as cautious hospitality soon reveals a chilling local custom of detaining outsider women, placing the entire group in grave jeopardy. In a desperate bid to buy time, the teacher draws the villagers’ focus onto herself, creating an opening that allows several students to slip away into the darkness.