The boy made a decision to keep fighting, and to protect the girl. The Holy Grail War, where Masters and Servants fight to claim the Holy Grail. A new war has started again in Fuyuki City, 10 years after the previous Grail War. However, due to the participation of Zouken Matou, the patriarch of one of the Founding Three Families in the Holy Grail War, things begin distorting, twisting, and growing worse. Zouken summons the Servant, True Assassin.