Fate/stay night: Unlimited Blade Works: The Holy Grail War is a battle royale among seven magi who serve as Masters. Masters, through the use of the command seals they are given when they enter the war, command Heroic Spirits known as Servants to fight for them in battle. In the Fifth Holy Grail War, Rin Toosaka is among the magi entering the competition. With her Servant, Archer, she hopes to obtain the ultimate prize—the Holy Grail, a magical artifact capable of granting its wielder any wish. One of Rin's classmates, Emiya Shirou, accidentally enters the competition and ends up commanding a Servant of his own known as Saber. As they find themselves facing mutual enemies, Rin and Shirou decide to form a temporary alliance as they challenge their opponents in the Holy Grail War. 舞台は海と山に囲まれた都市・冬木市。 そこで行われる、ある一つの儀式。 手にした者の願いを叶えるという聖杯を実現させるため、聖杯に選ばれた七人の魔術師に、聖杯が選んだ七騎の使い魔を与える。 騎士“セイバー" 槍兵“ランサー" 弓兵“アーチャー" 騎兵“ライダー" 魔術師“キャスター" 暗殺者“アサシン" 狂戦士“バーサーカー" マスターは七つの役割を被った使い魔一人と契約し、七組は、聖杯を求め、最後の一組となるまで殺し合いを繰り広げる。 その名は「聖杯戦争」。 2014年 秋、開戦――。
