xinqi, who visited the ancient zoo hall to visit the dinosaur fossils, and tyrannosaurus rex accidentally traveled to the dinosaur era tens of millions of years ago, and found a way home together with the help of yongchuan dragon - yongbao. during this amazing journey, xinqi, yongbao and tyrannosaurus rex enjoy the beautiful and charming natural scenery along the way and encounter many different kinds of dinosaurs. they made friends with docile and friendly herbivorous dinosaurs, fought wits and courage with cunning and vicious carnivorous dinosaurs, and finally defeated the ulterior motives of the tyrannosaurus, won the key to opening the time and space tunnel, and returned to the original world with all the dinosaurs on this land before the volcano erupted. aaa