But they are unable to go back in time since the time belt battery is empty. When everything starts freezing, Nobita, Shizuka, Suneo, Gian, Carla, Mosuke, Doraemon and Yuka-tan decide to travel 100,000 years later to survive but Doraemon and Yuka-tan are separated from the group while they reach in future. After facing many threats they come across the ruins of a huge city buried in the ice, and then travel back in time to meet Carla and Professor Hyakkoi, who are connected to the mysterious ring and finally meet them and Carla's yellow elephant Yuka-tan similar to MosukeĀ however, the group must fight for survival as Doraemon risks plunging the Earth into another ice age. They melt a blue elephant like structure whom Nobita calls Mosuke who was frozen in emice with a bag. After learning that the ring was buried in Antarctica 100,000 years ago, Doraemon tells Nobita and his friends that nobody had discovered Antarctica until 1773, Doraemon and his friends change their clothes to winter clothes and use Anywhere Door to visit Antarctica in search of its owner. While creating an amusement park with the secret gadget "Ice-Working Iron", Nobita finds a mysterious golden ring in the ice and he asks Doraemon to search how old the golden ring was. On the other hand, unable to endure the mid-summer heat, Doraemon transports Nobita and his friends to a huge iceberg floating in the South Pacific.
The film starts with 100,000 years ago, Carla losing her gold ring.