Teenage twins Rachel and Theo travel to Auckland to stay with relatives following the sudden death of their mother. Where there was once a psychic bond between them, now there is a rift as Theo, particularly, refuses to confront his grief. Rachel reaches out to him, but is rebuffed. They visit Mt. Eden, where Theo sees Mr. Jones, a strange old man from whose hands fire seems to glow. Inside the mountain, he and Rachel find what can only be an alien environment.