The film starts with 100,000 years ago, Carla losing her gold ring. 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. 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. 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. They melt a blue elephant like structure whom Nobita calls Mosuke who was frozen in ice with a bag. 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 Mosuke ; however, the group must fight for survival as Doraemon risks plunging the Earth into another ice age. 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. But they are unable to go back in time since the time belt battery is empty. Back in time, Doraemon remembers Dorami’s prediction that his lucky star can save him from getting frozen and freezes Yuka-tan with the bag of gadgets and the battery. Mosuke gives the bag to Nobita which was frozen with it and Nobita says Mosuke is none other than Yuka-tan frozen by Doraemon to send them the battery. Everyone travel back in time and save Doraemon and fight the ice giant. The film ends with showing Doraemon and his friends saying farewell to their friend Carla and Professor as they prepare to leave earth, after this Doraemon and his friends return to the home, Doraemon shows Nobita the planet’s (where Carla and Professor lived or home planet of Carla and Professor) ice is melting and after some time the planet returns to it normal condition and in the last sentence of the film before credits, Nobita’s Mom calls him and Doraemon for dinner. The planet’s position was given to Doraemon by professor. Doraemon uses a telescope to view the planet.