The story is set in a perfect, utopian world in the sky, where everyone lives happily. Adventurers have equated the land with other mythical cities, such as Atlantis or Ryuuguu-jou. Doraemon and Nobita set out on an adventure to find the utopia with the help of a gadget that is brand-new for the film, the time zeppelin equipped with a time warp function.
[Source: Anime News Network]