Spanning 300 million years of time and space, Doraemon’s biggest adventure in movie history! ! STORY Daxiong accidentally rescued a drowning puppy, named it "Xiaoyi", and took it home to raise it without telling its mother. Later, he adopted a kitten named Drunk Cat. One day, Nobita went to the mountains to play and found many abandoned kittens and puppies in the mountains. "Humans are too casual!" For the future of Hajime and these abandoned cats and dogs, he came up with a good idea. "Why don't we just bring them to the ancient times when humans didn't exist!" Because Doraemon was scared away by Xiaofu's toy mouse, Nobita himself used a shrinking lamp to shrink Hajime and the cats and dogs and multiply them through time. Travel machine, heading to the world 300 million years ago before humans were born. Finally arriving in a world without human habitation, Nobita uses the "evolutionary degradation radioactive source" to illuminate Xiaoyi so that it can understand human language, and then teaches it how to live on its own on this land. In the evening, in front of Nobita who was about to return, Xiao Yi's eyes were filled with tears. "Xiao Yi, I promise you, I will definitely come tomorrow." After saying that, Nobita took the time machine back. The next day, Nobita and Doraemon once again took the time machine and headed towards that world. However, they were suddenly involved in the distortion of time and space and came to the civilized and advanced cat and dog country, which was the world 1,000 years after that day. . I got acquainted with Hachi, Tomoko, Duck and Brutaro, as well as the ambitious cat Gera and his subordinates Cat Five and Natsumi... So, what is the true identity of the drowned cat? What kind of adventure will Doraemon and the others have? (The most classic sentence in the story: "It must be the feeling of missing that makes the miracle happen.")
1. When Nobita and Hajime broke up.
2. When Nobita saves Xiaoba.
3. The memory of Xiaoba falling into the water.
Overall, this theatrical version is quite touching.