The Holy Grail has caused three devastating wars in the past as it possesses the power to grant wishes, yet no victor has been crowned. However, the Einzbern family is confident that the Fourth Holy Grail War will end differently, as they now possess a vessel of the Holy Grail. To increase their odds, they request the assistance of Kiritsugu Emiya, also known as the "Magus Killer," in exchange for the hand of their daughter, Irisviel. Kiritsugu is pitted against six other contenders in a perilous battle, each wielding ancient familiars and driven by their own objectives and beliefs. With Saber by his side, Kiritsugu must face his toughest adversary, Kirei Kotomine, a priest determined to eliminate Kiritsugu to fill the void within himself. Fate/Zero, based on Gen Urobuchi's light novel, chronicles the gripping events of the Fourth Holy Grail War, which took place a decade before the events of Fate/stay night. In this intense battle royale, no one is guaranteed unscathed, creating an exhilarating spectacle for all to witness.