Twelve-year-old dinosaur expert Eric, his young sister Rose and their faithful dog Sally find themselves mysteriously transported back in time 65 million years to the era of dinosaurs. Amazingly, they are befriended by an intelligent, evolved creature named Weet, with whom they become embroiled in a distinctly prehistoric adventure. Will Eric and his sister ever be able to return to their own world? Will Weet's knowledge be of any use if they run into the most fearsome predator of all time, Tyrannosaurus rex?