One day, Nobita accidentally found the doll bear that his grandmother sewed for him in childhood, and a warm memory came to his heart. He decided to beg Doraemon to go to the past and visit his grandmother who was no longer alive. When Doraemon heard Nobita's request, his heart was filled with emotion. In order to fulfill his wish, he drove the time machine back to the past again
Nobita and grandma reunited in the time tunnel. They hugged each other and cried, recalling bits and pieces of their childhood. Grandma asked about Daxiong's life when he grew up, hoping to see him get married with his own eyes. Daxiong nodded gratefully and decided to grant grandma's wish.
So, Nobita and Doraemon embarked on a journey to the future again. Time flies, and finally came the day of Nobita's wedding. Everyone gathered at the wedding venue and couldn't wait to witness this blissful moment. However, what is surprising is that the groom's grown-up Nobita was not there!
Everyone felt anxious and confused, not knowing where the adult Nobita went. At this time, Doraemon stepped forward and decided to help everyone solve the mystery. He recalled his previous time travel experience, and suddenly thought that an accident might have happened to the adult Nobita during the time travel.