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.
然而，骷髅13号在刺杀蜂后时处于危险之中，同时也发现了一个巨大的阴谋
在過去...使用著太古的恐龍之力與宿敵·德魯伊東族（ドルイドン族）戰鬥的戰士們。其名為『龍裝者』。 他們騎乘著搭檔恐龍的『騎士龍』，並以靈魂中所寄宿的『龍裝魂』每日展開遼闊般熾烈的戰鬥... - 時間流轉至現代 - 和平的世界使得『騎士龍』們的強大力量因此封印沉睡，直到德魯伊東的再臨而逐漸甦醒... 前所未有的超級戰隊即將嶄開序幕！
