Unglassed Windows Cast a Terrible Reflection

An anatomy of violence. Four young men and two young women are on a drive. There's a rivalry between two guys for one of the girls. On a remote road, the car stalls. The driver hitchhikes for help. Led by the intrepid girl, the others walk toward abandoned buildings, perhaps a mining operation. One of the three guys sits and reads. The intrepid one explores the building and sees something that sca