Shin-chan must rescue the adults of Kasukabe when they mysteriously abandon their responsibilities to relive their youth at the new 20th-century expo.
There’s only one way to stop a filthy evil scientist from destroying the world, and it’s with a powerful hot spring located under Shin-chan’s house!
It all begins when a secret agent hiding in the ship where dinner Futaba school students. The Pig Hoof follow and take the boat with her, Shin Chan and his friends on board. From there, Shin Chan, Masao, Nene, Kazama and Boo Chan van with Agent everywhere as their hostages.
Shin-chan somehow travels back in time, where he promptly involves himself in samurai wars and political intrigue, changing history left and right!