Shirou Emiya is a high school student who always helps people around him whenever he has a spare moment. His dream has always been to become a hero of justice. One night, he stumbles upon a battle between two Servants...

Rin takes Shirou and Saber to the church in New Fuyuki. She introduces Shirou to Kotomine Kirei. Will Shirou accept to participate in the Holy Grail War despite all the danger?

Rin and Shirou run into a girl named Illyasviel von Einzbern. She has a Servant who is a big mad monster! What does this girl want from them?

Saber tells Shirou all about Heroic Spirits and Noble Phantasms. She explains why she doesn't want to reveal her true identity to him. Shirou wants Saber to stay at his place for a while. Will Fujimura approve this request?

Despite losing Saber, Shirou is determined to fight. Since Caster is protected by Kuzuki and Archer, Shirou and Rin decide to team up with another Master. Left with no other option, they set out to find Illyasviel and Berserker.

Shirou and Rin finally reach the castle where Illyasviel and Berserker are. However, there are other unexpected guests visiting Illyasviel.