Nobita, who visited the dinosaur exhibition with Suneo and his friends, finds fossils of dinosaur eggs in a fossil excavation experience. The twins of the feathered dinosaur were born with "time wrapping cloth" and covered. This is a new species (new dinosaur) not listed in the "Complete Encyclopedia of Space". Nobita named the dual dinosaurs Q and Mu, sometimes on the advice of Dr. Dinosaur, who grew up with Doraman in Novicharasland. The two fast-growing animals gradually showed a difference, and the mark flew ugly against the slightly sliding muzzle so they could not fly. Finally, the day of our opening will come before the giants. However, by using the "spatial movement crayon" to hide from the uncle who noticed the chaos, the townspeople saw it, and in modern times Q and Mu reached the limit of growth. Nobida once had trouble getting back to her friends, but when she decided, the next morning, the five of them climbed into the "time machine".