生活在诹访原市的极其普通的学生藤井莲，和亲友游佐司狼互殴决斗后，绝交。
其后仍然与青梅竹马绫濑香纯和学姐冰室玲爱一起过着学园生活。
但他所居住的诹访原市开始出现无差别断头杀人事件。 并且奇怪的是，莲这时开始做起自己在断头台上被斩首的噩梦。而这对他来说，只是充满恐惧和痛苦的战争的前兆。
日常生活被颠覆。暗处超常人群在暗暗行动。城市成为战场，超乎寻常的事情向莲袭来。面对不战斗就无法生存的现实，他是否能夺回自己平凡的生活呢？
On May 1, 1945 in Berlin, as the Red Army raises the Soviet flag over the Reichskanzlei, a group of Nazi officers conduct a ritual. For them, the slaughter in the city is nothing but the perfect ritual sacrifice in order to bring back the Order of the 13 Lances, a group of supermen whose coming would bring the world's destruction. Years later, no one knows if this group of officers succeeded, or whether they lived or died. Few know of their existence, and even those who knew began to pass away as the decades passed.
Now in December in the present day in Suwahara City, Ren Fujii spends his days at the hospital. It has been two months since the incident that brought him to the hospital: a fight with his friend Shirou Yusa where they almost tried to kill each other. He tries to value what he has left to him, but every night he sees the same dream: a guillotine, murderers who hunt people, and the black clothed knights who pursue the murderers. He is desperate to return to his normal, everyday life, but even now he hears Shirou's words: "Everyone who remains in this city eventually loses their minds."
(Source: ANN)
