Nobita (voiced by Ohara Megumi), Fat Tiger (voiced by Kimura Subaru), Suneo (voiced by Guan Zhiyi) and Shizuka (voiced by Kakazu Yumi), who wanted to run away from home under heavy pressure from their parents, came to the earth 70,000 years ago with the help of Doraemon (voiced by Mizuta Wasabi). While creating their own paradise, they encountered the mysterious boy Guguer, and were then involved in the tribal struggle between the light tribe and the dark tribe. Everyone worked together to fight the giant, but they didn't want to discover a shocking secret...