The scientists who have come to know and love the three subjects in California, Big Guy, Lady Di and baby Bryce, as they are called, risk jail and life itself in their battle against the Top Secret computer, Scorpion, a mechanical beast operating in the sub-levels of the desert.

The large male Bigfoot actually shows the way to battle nanotech with cunning and astounding feats of physical powers. An awareness of the importance to man of these hidden creatures is imbued into the great minds of the scientists. They realize the fate of the world hangs in the balance.