After disappearing from the underworld, the legendary yakuza known as the "Immortal Dragon" resurfaces — as a fiercely devoted stay-at-home husband.
Nobita accidentally finds a fossil dinosaur egg mixed with rocks in the dinosaur fossil exhibition site that he had visited before. He returns it to its original state with the 'time blanket'.
Follow the friendship between the Nobara family's pet dog Shiro and a "small dinosaur". Their connection helps the growth of Shinnosuke and the Kusakabe Defense Squad.
