A modern youth travels back to the Cretaceous period and turns into a little Tyrannosaurus Rex. As soon as he lands, he is chased by Coelophysis, but fortunately, the helpful little Sinosauropteryx A Biao helps him out. Two little dragons with different personalities travel together, clearing levels in the prehistoric jungle by digging traps, using fire, and making tools, and even take in a lost little Ceratosaurus to form an adventure team. On the crisis-ridden prehistoric continent, they use wisdom and courage to defuse difficulties, staging a hilarious and warm growth story.