After falling for BC Freedom High’s clever deception, the Oarai Girl’s High tank-maidens find themselves faced with an entirely different battlefront than expected. However, Yukari suspects that any bluff that could have been carried out so easily by so many people must have some basis in fact. So, as the other school teams prepare for combat across the competition, Oarai digs down with a plan to undermine the groundwork beneath their opposition.

When the Ministry of Education goes back on its promise to keep Ooarai Girls Academy open, the task of saving the five-mile-long Academy Ship from the wreckers falls to Miho and her barely-seasoned tankery team. However, things go off track almost immediately. While the Oorai tank crew may have won the high school tournament, they’re now facing a larger and more experienced university team, and if they fail, their armored vehicles will be forfeit! Will they be swapping their tanks for the memories? It’s possible, but winning a tank battle is all about tactics and teamwork, and the fledgling Ooarai students have more friends and allies than anyone suspects.

出生于坦克世家的高中少女西住美穗（渕上舞 配音），早已厌烦了被作为传统文化在世界范围内普及、号称修炼女性的“战车道”。为了逃避这个恼人的宿命，美穗特意转学至没有这一科目的大洗，并结交了渴望浪漫爱情的武部沙织（茅野爱衣 配音）和擅长花道的五十铃华（尾崎真实 配音）两位好友。谁知日本即将举行战车道大赛，美穗所在的大戏女子学园也顺应恢复了战车道的科目。由于相关经验学院短缺，在学生会长强迫之下，美穗和两位朋友一同选修战车道。对于这门停滞已久的学科，18名少女们寻找废弃战车、维修护理、进修操作和作战课程、实战演习……，如此等等，一切都从头开始。
经过一段时间的艰苦磨练，大洗女子学园的少女们驾驶着神采奕奕的战车，开向了高手如云的全国大赛会场……

20世纪末，15岁的少年榊原恒一（阿部敦 配音）由于父亲前往海外公干的原因，于是来到亡母的家乡夜见山市，暂住阿姨三神怜子（宮牧美沙代 配音）家中等待转入新的学校。在此期间，他的旧病复发，入院治疗，某晚，恒一在空荡荡的走廊内邂逅一名穿着水手服、左眼戴着眼罩但阴气逼人的美少女，这似乎预示着一段不平凡生活的开始。病愈出院，恒一顺利转入夜见山北中学3年3班，同学们热情亲和，可是似乎对他隐藏着什么秘密，而且他也再次看见医院的那名眼罩女孩——同班同学见崎鸣（高森奈津美 配音）。当他尝试接近见崎时，殊不知自己已经无意间掣动了死亡的闸门……
本片根据名本格派推理小说家绫辻行人的原著及经清原纮漫画化的原著改编。