Nobita brought the fossils found in the dinosaur exhibition home, and with the help of Doraemon's time baggage, he successfully hatched two new dinosaurs with wings that had never been discovered before. Nobita and his friends decided to bring the little dinosaurs back to their own era, and a thrilling Cretaceous adventure is about to begin. This film is a commemorative work for the 50th anniversary of the serialization of the "Doraemon" comics, and it is also the 40th work in the "Doraemon" series of films. A new story, a new Nobita, a new adventure, a new start!