聖杯戦争。それは万能の願望機を求め、七人の魔術師とサーヴァントが覇を競い合う殺し合い。冬木の地で行われた第五次聖杯戦争終結より幾年。アメリカ合衆国、スノーフィールドの地において観測された聖杯の予兆。盤上に集うイレギュラー尽くしのマスターたちに、次々と召喚される規格外のサーヴァント。そこに顕現する戦いが満たす器は、偽りか真実か。前代未聞の聖杯戦争がいま、幕を開ける──。
A famosa Guerra do Santo Graal, onde magos (Mestres) e seus Espíritos Heroicos (Servos) batalham para conquistar o Santo Graal: um receptáculo capaz de realizar qualquer desejo. A guerra que normalmente ocorria no Japão, está ocorrendo agora em Snowfield, nos Estados Unidos da América... Mas há uma classe faltando e falsos Servos no meio... Essa será uma Guerra completamente deturpada.
In a Holy Grail War, Mages (Masters) and their Heroic Spirits (Servants) fight for the control of the Holy Grail—an omnipotent wish-granting device said to fulfill any desire. Years have passed since the end of the Fifth Holy Grail War in Japan. Now, signs portend the emergence of a new Holy Grail in the western American city of Snowfield. Sure enough, Masters and Servants begin to gather... A missing Servant class... Impossible Servant summonings... A nation shrouded in secrecy... And a city created as a battleground. In the face of such irregularities, the Holy Grail War is twisted and driven into the depth of madness. Let the curtain rise on a masquerade of humans and heroes, made to dance upon the stage of a false Holy Grail.
Una nueva Guerra del Santo Grial se prepara en un pequeño y nuevo país pese a la oposición de los magos, pero es una Guerra del Santo Grial falsa, artificial, cuyo objetivo escapa a los miembros de la Torre del Reloj.
