The film's story begins when Shiriri, an alien, arrives and turns Hiroshi and Misae into children. To turn them back, Shinnosuke must travel the length of Japan with Shiriri hidden in his butt. Meanwhile, Shiriri's father is moving forward with a huge conspiracy. 

(Source: ANN)

Hiroshi and Misae have never been to a honeymoon trip to a foreign country. One day, Misae discovered an inexpensive and family-friendly holiday package to Australia and the Nohara family decided to make it their first honeymoon vacation. Hiroshi gets kidnapped upon arrival to Australia, leaving Shinnosuke, Misae and others on a dangerous journey. It turns out that Hiroshi is the key to a secret treasure. The remaining members of the Nohara Family must rescue Hiroshi, while a mysterious masked man and treasure hunters from all over the world are after him. The struggle is among three different groups in this action-filled treasure hunting adventure.

One summer vacation, Ruka meets two boys, "Umi" and "Sora," whose upbringing contains strange and wonderful secrets. Drawn to their beautiful swimming, almost more like flying, Ruka and the adults who know them are intertwined in a complex mesh... Meanwhile, an unexplained anomaly is occurring all over the world: fish are disappearing. Thus begins a marine adventure of boys and girls to captivate all the senses!

In the year 2029, Niihama City has become a technologically advanced metropolis. Due to great improvements in cybernetics, its citizens are able to replace their limbs with robotic parts. The world is now more interconnected than ever before, and the city's Public Security Section 9 is responsible for combating corruption, terrorism, and other dangerous threats following this shift towards globalization.

The strong-willed Major Motoko Kusanagi of Section 9 spearheads a case involving a mysterious hacker known only as the "Puppet Master," who leaves a trail of victims stripped of their memories. Like many in this futuristic world, the Puppet Master's body is almost entirely robotic, giving them incredible power. 

As Motoko and her subordinates follow the enigmatic criminal's trail, other parties—including Section 6—start to get involved, forcing her to confront the extremely complicated nature of the case. Pondering about various philosophical questions, such as her own life's meaning, Motoko soon realizes that the one who will provide these answers is none other than the Puppet Master themself.

[Written by MAL Rewrite]