After a tragic fire that claimed the lives of his family, Shirou is taken in and trained in the ways of magic and justice by Kiritsugu Emiya, his adoptive father. Years later, while cleaning at school, Shirou is caught in a dangerous clash between two powerful beings known as Servants and receives a life-threatening injury. Despite his injuries, Shirou summons his own Servant, a knight named Saber, to come to his aid. Together, they are thrust into the Fifth Holy Grail War, where they must compete against seven other Servants and their summoners for the ultimate prize: the Holy Grail itself. As Shirou navigates the treacherous landscape of the war, he struggles to maintain his morals and principles. Will he succumb to the brutality of the war and become a killer, or will he persevere and prove himself to be a hero like his beloved foster father?