Fate/Zero makes you argue with yourself about whether Kiritsugu Emiya is a monster, then refuses to settle it. This is a show where the single best episode is three Servants standing in a warehouse with wine, arguing about what a king owes his people, and Iskandar wins the room without swinging his sword. Ufotable spends its budget where it matters: Lancer's twin spears in the harbor, Ionioi Hetairoi unfurling into desert sky, Ea grinding reality apart. But it earns its bruises elsewhere. Kariya Matou crawling through worms for a woman who never loved him. Kirei Kotomine discovering he can only feel joy while ruining someone. Kiritsugu picking the math over Natalia, then over Irisviel, then watching the Grail hand him the exact hell his math built. Yes, it talks a lot. Yes, episode one is a table read of magus politics. Stay for Waver on Iskandar's chariot, shouting like a kid who finally has a hero.

Seven mages enter a brutal tournament for the Holy Grail, a relic that promises to fulfill any desire. Three earlier wars ended with no winner, but the wealthy Einzbern family believes the fourth will go differently. They hire Kiritsugu Emiya, a feared assassin known as the Magus Killer, and seal the deal through his marriage to their daughter Irisviel. He is paired with Saber, a summoned heroic spirit, while six rival Masters call up servants of their own, each driven by personal ideals. His most troubling rival is Kirei Kotomine, a priest drawn reluctantly into the war who hopes to fill an emptiness inside himself. Set in Fuyuki a decade before Fate/stay night, the war offers no guarantee that anyone survives.