Nobita hatches two new dinosaurs, named Kyu and Myu, via the Time Cloth. Nobita nurtures and takes care of these dinosaurs, to prove to his friends that he can find a real dinosaur. Once the dinosaurs are of age, Nobita shows them to Shizuka, Gian, and Suneo. Afterwards, the gang takes a trip to the past, where they can see Kyu and Myu’s home, which have many other dinosaurs inhabiting it. This causes some trouble for everyone, as they try to stay safe. Along the way, there is a group of mysterious foes who hope to steal Kyu and Myu from Nobita.