A group of young girls possess a mysterious power known a "Alice's Dream, " which gives them the ability to turn their thoughts into reality. Detained and experimented upon, these youths are locked away in secret until one of them manages to escape. Her name is Sana - a girl with the power to ignore the very laws of physic.

The Ark Fleet has been destroyed, and a significant number of the enemy's troops have been wiped out due to its crash landing. As the remaining forces of the Holy Order of Michael regroup in order to launch a final assault on Weiswolf Castle, the wZERO unit, along with their new ally Ashley Ashra, stand ready to intercept them. Meanwhile, with his Geass out of control, Shin moves to erase his younger brother's existence once and for all. But Akito, having promised Leila that he will come back alive, refuses to accept such a fate, and the two clash in their final battle.

在寒冷的北海道旭川市某处，生活着以美人自居的大小姐九条樱子（伊藤静 配音）。除了有些自恋外，樱子还有用死尸骨头制作标本的怪癖，其对于验尸更有着较深的学识。也许正是对尸体、骨骼那有着近乎偏执的异乎寻常的喜爱，让樱子接二连三卷入各种匪夷所思的死亡事件中。在此过程中，普通高中生馆胁正太郎（榎木淳弥 配音）也被樱子牵着鼻子跑来跑去，见证着每一个案件被侦破的瞬间。对于死者来说，恰恰因为有了樱子这样的怪人，才让他们的冤屈得以昭雪…… 本片根据太田紫织的同名轻小说改编。

故事发生在1924年的圣瓦尔贵族子弟寄宿学校玛格丽特学院，转学生久城一弥（江口拓也 配音）刚刚来到学校，就因外表而被称为不详的“黑色死神”。实际上，一弥是个老实又木讷的男孩，可正是这样的性格使他总是轻易的会被卷入难以用常理来解释的怪奇事件中。在一次杀人事件中，一弥遇见了身材娇小一头金发的少女维多利加（悠木碧 配音），这个谜一样的少女以其高超的智商帮助一弥脱出了险境，两人的羁绊也从此开始了。 在这个校园里，流传着许许多多耸人听闻的灵异事件，而在这些事件的背后，作祟的究竟是鬼怪还是人类，这个问题的答案就要交给一弥和维多利加去一一破解了。