Seeking the power of the Holy Grail, something that can make miracles occur, seven different mages summon seven Heroes, and fight until the last man remains--a battle of epic proportions, the Holy Grail War. In preparation for the war, various participants are chosen from all over the globe. Eight years ago in Einzbern Castle in Germany, a girl named Illyasviel is born. Her father, Kiritsugu Emiya, embraces her knowing he will be part of the battle, as well.

Kiritsugu and his daughter Illyasviel stroll through the Einzbern woods. As Saber watches the happy parent and child, she ponders why Kiritsugu has not spoken to her since she was summoned. And in Fuyuki City, the battle ground where the Holy Grail War will be fought, the seventh and final hero is summoned.

The mystery of the mass kidnappings in Fuyuki remains unsolved, with more kids disappearing daily. When Tohsaka Rin can't get in touch with her friend Kotone, she braves the darkness and enters the city on her own to search for her. That's when she spots a strange man leading two kids around and decides to follow him...

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.

As a child, Kiritsugu lived on a small island with his father Nori. Nori's magical work with flowers has captured the attention of a local girl.

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