A cave named Gruta de las Pesadillas was known to be a place whereby entering the cave with a torch or lamp, you would see your darkest nightmares reflected onto the shiny minerals from the inside. I was given access to a written document describing the experience of a man at the Gruta de las Pesadillas in 1914. He writes about leaving his house at night, going to the cave, and his experience there. — This film is a visual and sonic recreation of the described event.