Sewashi and Doraemon find themselves way back in time and meet Nobita. It is up to Doraemon to take care of Nobita or else he will not return to the present.
Nobita travels to the future to show his beloved grandma his bride, but adult Nobita has fled his own wedding.
Luca follows in his father's footsteps to rescue his mother from evil Ladja. Finding the heavenly hero who wields the Zenithian sword is his only hope.
