在一个阳光明媚的日子里，克林、小八戒、布玛、悟饭（野泽雅子 饰）相约去山里野营。夜深人静，一枚来自外太空的飞行器引发森林大火。克林和悟饭用气吹散大火，并集结七颗龙珠召唤神龙，将被火焚毁的森林恢复原状。悟饭还认识了新朋友快速龙。
麻生圭司发了一封有意义的信和50万日元的佣金，柯南、兰和小五郎去了泉中的月影岛。然而，钢琴家麻生在村里的办公室听到麻生的消息后，被告知他12年前在岛上的一个家庭自杀。
The story of the movie is somewhat based on the plot of the most recent game, "Sakura Wars 3," released back in March this year. While the game features Lieutenant Ohgami, the main character who takes off for Paris, narrates one side of the story, the movie unveils the secrets behind Hanagumi. Ohgami leaves for Paris, consequently leaving Hanagumi without a leader; thus a new character will be introduced here. To be replaced with Lieutenant Ohgami is the former leader of Hoshigumi, Rachette Artile - a rationalistic and distinct individual, who brings about serious problems to Hanagumi. The members are now in discord with Rachette. Meanwhile, Teikoku Kagekidan was being threatened by some irrelevant demons and a new type of anti-kouma mechas, (brought by an american company) appears and tries to replace the koubu-kai. Having made repeated mistakes due to the absence of Ohgami, Hanagumi is now faced with an unprecedented danger, while the abolishment of Teikoku Kagekidan Hanagumi is being schemed.
