Teenage Cave Man

As the restless son of the caveman tribe's symbol maker, Vaughn hunts for food, romances a blonde maiden, and is warned by the elders not to venture beyond the river to the land of the monster "that Gives Death with its Touch." Of course, he's a teenager, so he goes anyway and discovers some pretty shocking secrets. We learn that this is not a prehistoric tale, but a post-apocalyptic tale, and the strange creature is a 500-plus year old irradiated scientist in a radiation suit...