Thanks to Dr. Bunsen s latest wacky invention, the DATA Set are blasted back to the prehistoric era. Gabe is in heaven, but Laura warns that they shouldn t touch anything. She s afraid they could contaminate the past and permanently change the future! But it s hard not to interfere with the locals as the crew quickly finds themselves dashing from flying pterosaurs, stomping stegosaurus stampedes, and a sharp-toothed T-rex! Will they be able to survive in the past or have their futures been lost for good?