Doraemon brings home a space-racing game from the future for Nobita and his friends, but a mishap with another gadget leaves Gian and Suneo stuck inside it just as the game is carried off by a mysterious spaceship. Doraemon, Nobita and Shizuka give chase in a space exploration boat and slip aboard the ship during a wormhole storm. Its crew, Lian, Log, Freya and Gorogoro, are heading home to their mothership after searching for an uninhabited planet where their people can settle.