职场OL铃木静香（三吉彩花 饰）在日本一流公司任职。某一天，她意外地被一位催眠师催眠，得了一个连医生都检查不出来的“怪病”：无论何时何地，每当听到音乐响起，就会不由自主地唱歌跳舞。这个“怪病”给静香的工作和生活都带来了极大困扰，她找到了催眠师前助理斋藤千绘（八城优 饰），一起踏上“治病”之旅。随之，一系列荒诞搞笑的故事就此展开。与白色彗星帝国作战三年后——为了拯救濒临灭亡的加米拉斯民族，戴斯拉总统继续探索新的母星，最终在银河的一处找到了符合条件的行星。但是，那里是强大的星际国家的领土范围内。在银河中爆发的领土纷争，导致与加米拉斯缔结安全保障条约的地球被无情地卷入到了其中。给地球带来军事、经济优越性的时间断层技术，以自己的生命为代价而消失了——虽然被自责的念头驱使着，但依旧担任着大和号新舰长的古代进，为了应对即将到来的事件，和新船员们一起开始了航海训练。却也不知道其中混进了什么人在盯着自己。尽管如此还是要“活下去”在从未有过的不安时代，大和号迎来了新的旅程。在那前方，有着超乎想象的新敌人在等待着他们……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.
