Rider, Saber, and Archer sit down for a drink and discuss what makes a King. The talk turns to violence when Assassin interrupts…

The battle against Caster continues as the Heroes have no way of stopping him. Toki is trying to appeal to Archer to use his Noble Phantasm to obliterate the monster. Kiri meanwhile, is planning to destroy the source of the monsters powers.

Natalia has raised Kiritsugu since rescuing him from the island. He has followed her in every step in becoming an assassin. Over the years their relationship has grown to the point of mother and child, so what Kiritsugu does next is…

Saber vs. Berserker, Archer vs. Rider, another hero will fall and a secret will be revealed.

Two heroes, two masters, one grail; a winner will be decided.