On May 1, 1945, in Germany, a group of Nazi officers carried out a certain ritual during Berlin's collapse since the countless lives lost in the battle served as a catalyst to their sacrificial ceremony.

Following the war, they faded into the realm of myth with no one knowing if this group of officers succeeded in reviving the Order of the 13 Lances.

After leaving the hospital, Ren intended to rebuild his new life without Shirou, but his plan falls apart as irrationality that defies the realm of common sense begins to assault and devour the city.

[3][4] It is produced by the studio Genco, with script supervision by the game's designer, Takashi Masada.

[11] The Dies Irae anime project was financed through a crowdfunding campaign[13] ending in July 2015, through which ¥96,560,858 was raised, over three times the target figure of ¥30,000,000.