When Suneo boasts about a space travel gift from his father, the reality of the distant journey dawns on him. Turning to Doraemon for a shortcut, they end up in a space simulation game with unexpected consequences. As a mishap unfolds, Suneo and Giant find themselves stuck in the game, soon whisked away by a cosmic being. This prompts Nobita, Shizuka, and Doraemon to chase the UFO housing the game, thrusting them into an unforeseen cosmic escapade.