Nobita suggests that they should go back in time to live in a place with no humans residing in Japan.

At night, the group eat the supper and decide to return home and visit there another day.

On the next day, the boy from the start of the movie secretly moves into Nobita's room and hides inside the closet.

Meanwhile, Doraemon searches with a signal through time and learns that the boy hails from somewhere in present-day China, which has been already inhabited by humans by this era.

Next day Doraemon tells everybody that the dogū can restore itself and the light tribe is still in danger, so they again go back in time.

On the other hand, Nobita finds a box near him and sees a mammoth that tells him that if he needs help he should just press the button.

At the end, Pegasus, Dragon and Griffin are taken to the future as they were fictitious creatures in the current era.

An English version produced and released exclusively in Malaysia by Speedy Video, features an unknown voice cast.