Kiritsugu Emiya and his familiar, Saber, are among the contenders in the Fourth Holy Grail War. To claim the power to grant any wish, the notorious mercenary must face six other participants, each aided by an ancient familiar and driven by different desires and ideals.
Three previous wars over the Holy Grail ended without a victor. The wealthy Einzbern family nevertheless expects to succeed this time because it has secured a vessel for the Grail. That advantage led the family to hire Kiritsugu, the despised “Magus Killer,” sealing their agreement through his marriage to their only daughter, Irisviel.
Amid the lethal competition, Kiritsugu's greatest opponent emerges in Kirei Kotomine. A priest troubled by an inner emptiness, Kirei pursues Kiritsugu in his search for salvation.
