May 1, 1945... Germany. In the fallen Berlin, some people are performing a ritual. To them, losing the war is nothing but a trivial matter, and they even offer the large number of victims in the war as catalysts for the ritual. No one knows whether their attempt succeeded or failed. They hid their whereabouts after the war, and it is unknown whether they are alive or dead, and it is even impossible to be sure whether they really existed. No one knows the truth, and only rumors spread. The 13 Knights of the Holy Lance - supermen born in the darkness of Nazi Germany. They will eventually return. When the world is destroyed, they must not be allowed to come back - such a rumor. Then 61 years passed. Most of those who knew of their existence have died, and everyone has forgotten them. However - 2006... Japan. Fujii Ren, who was studying at a school in Suwahara City, broke up with her good friend Yusa Jiro after a certain incident. The result of the fight was that she was forced to be hospitalized for two months. The season turns from autumn to winter - December is approaching Christmas. Feeling as if half of her body has been taken away, Ren, who has been discharged from the hospital, wants to rebuild a new daily life without Silang. The past cannot be brought back. So, at least cherish what you have now... But even this wish has fallen apart. The nightmare of the guillotine that I dream of every night. The murderer who hunts for heads. The black-clad "knights" who are chasing him. The disorder beyond common sense covers the city and gradually erodes it. This abnormality is completely different from two months ago. It is so violent that it shatters everything that has been accumulated so far. If you don't change, you can't live. If you don't live, you can't go back. In the center of the world that is going crazy at an accelerated rate, Ren crosses the boundary between the daily and the abnormal alone. I don't expect anything extraordinary. I don't want to hold high the banner of justice and righteousness. I just want to go back. Back to the boring, boring, but ordinary and warm time. With a tragic determination in his heart, Silang's voice echoed. As long as they stay in this city, no matter who they are, they will go crazy sooner or later - he said so. The battle with the 13 Knights of the Holy Lance. The continuation of the war filled with madness, killing and curses. What will Ren see at the end?