Проснувшись в странном виртуальном мире без единого воспоминания о своём прошлом, Хакуно Кисинами обнаруживает, что он оказался втянутым в битву на выживание. Приз за победу в этой войне бесценен — это исполнение любого желания. Вместе со «слугой», загадочной девушкой, которая встала на сторону главного героя, Хакуно вынужден сражаться на смерть с другими участниками Войны за Святой Грааль. Соглашаясь участвовать в битвах, Кисинами преследует особую цель — найти ответ на вопрос, кто же он такой.

A technological hell masquerading as paradise, Tsukimihara Academy is an artificial high school that serves as the setting for the next Holy Grail War. Created by the Moon Cell computer, the school is inhabited by Earth-projected souls who have even the slightest aptitude for being a "Master." Of these 256 souls, 128 will be chosen for the main tournament and granted a Servant. With all of the Masters selected, the Academy activates a purge, targeting the remaining lifeforms for elimination.

Awakening in a pool of his own blood, Hakuno Kishinami refuses to die. Fueled by unknown feelings of hatred, he vows to fight for survival. As he struggles to escape from a relentless pursuer, he finds a crimson blade plunged into the ground; and by pulling it out, Hakuno summons his own Servant, Saber, who instantly destroys his pursuer in a flurry of rose petals. With his newfound power, Hakuno must now begin his journey to Moon Cell's core, the Angelica Cage. There, he will unveil the reason for this artificial world and the secrets of his own blood-soaked past.

[Written by MAL Rewrite]