A meteor lands on earth and the next day is taken to a laboratory but next day one of the geoligists is found petrified and the lab wrecked and covered in stones. Meanwhile a yong girl named Ginny on a field trip picks up one of the rocks and takes it home and she puts it in a barrel of water and the next day she is found along with her parents who are dead and Ginny turning to stone surrounded by the same type rocks. Anaylisis indicated by soil samples indicates that they have no silicone and with that fact they cure Ginny. Meanwhile the meteor begins to grow to monolith size and they are moving toward a nearby city feeding off silicone and the water soaked soil as the scientists find the solution- salt and they find that the monoliths are heading toward a salt flat so they dynamite a nearby dam flooding the salt flats stopping the monoliths in their tracks.