A daring scientist leads an expedition into the interior of the Earth, where fierce dinosaurs and an intelligent reptilian race battle a primitive human civilization.

Science professor Trevor Anderson's radical theories have tarnished his reputation. While backpacking across Iceland with his nephew Sean, the two find a cave that leads them deep down into the bowels of the planet. They go on a quest to find out what has happened to Trevor's missing brother, also a scientist. Trevor, Sean and their mountain guide discover a fantastic and dangerous lost world in the center of the earth. There, they discover a bizarre...