A young girl is drawn into a mystery involving sealife around the world, in which two mysterious boys are somehow involved.
After bringing a fossilized egg back to life with the Time Cloth, Nobita finds himself the owner of a baby dinosaur. Everything is fine until it grows up. Nobita and friends use Doraemon's time machine to return it back to its own time.
Nobita finds a small plant still in a container at an abandoned area and decides to take it home. His mother asks him not to put it on their garden because it won't have space to properly ...