The Ultimate Vampire Resource and Directory

Dan Foreman works as a tunneling engineer at the Department of Energy's high energy physics project known as the Superconducting Super Collider which began construction in Ellis County, Texas in 1989. The project will be the largest scientific machine ever built if it can be completed.

Dan invents a self-contained tunnel boring machine that will tunnel faster and more efficiently than any other machine ever built. On its maiden journey the tunneling machine is sabotaged, and Dan and his three friends are propelled deeper and deeper into the Earth's mantle. But upon breaking through the mantle, Dan, Edy, Jennifer and Larry are confronted, not with molten lava, but a lost civilization that is ruled by giants and dinosaurs and where the sun never sets.

While trying to find a way out of the dangerous world the four explorers are befriended by a city filled with Stone Age citizens. While helping their new friends fight giants and dinosaurs the explorers forget about escaping the dangers of the underground until tragedy strikes. Now, Dan must make a decision: should he leave the underground world to help his new found friends? If Dan can return to the surface, will he find anyone willing to believe his fantastic tale? It is now a battle of time with many of his friends' lives hanging in the balance.