The Hollow Earth Special Forces team that began its journey to the center of the earth has not been heard of for weeks. They are assumed missing and dead.

The new President fears that if they don't move quickly enough the next Big One that is being predicted will overwhelm the entire planet's population and destroy everything.

So the British Prime Minister with the help of the new President and their allies decide to form a new team that will launch through the opening that was discovered
to lead inside of Mount Shasta, long believed to have a huge underground city beneath it.