Comical action adventure film set in the future world, like a dystopian science fiction. Shinnosuke's future fiancee, Tamiko Kaneari comes from the future via the time machine. She says her father Masuzo Kaneari captures adult Shinnosuke in the future world and they needs the power of Shinnosuke at age 5 to rescue him. She takes Shinnosuke and Kasukabe Defense Forces members to the future big city Neotokio, which is the world ruled by Masuzo Kaneari, the president of the electric power company Kaneari Electric.