Ten years ago in Fuyuki City, a young boy was caught in a massive inferno that incinerated his parents and consumed a large portion of the city; as he was dying, a man saves him. Now this boy, Shirou Emiya, is an amateur mechanic who attends school at Homurabara Gakuen. Shirou also seems to be quite a bit of a magician but his abilities are no where near the level of his late father's. Meanwhile, the city is beginning to be plagued by gas spills and homicides and with Shirou's sense of justice starts to kick in, what could someone like him possibly do?

Shirou introduces Saber to Sakura and the one teacher saying she is a distant relative. The teacher tests Saber's skills to be able to defend Shirou rather pathetically, she allows her to stay at the house with him.Rin and Archer are talking he asks her why she doesn't go after Shirou, an easy target to kill. She says if he were to show up in front of her without being aware of it, she would kill him.At school some girls are missing from school for the second day in a row. After school, Shirou has stayed to investigate these disappearance when he runs into Rin. Rin confronts Shirou calling him an idiot for idly walking around without his Servant and she attacks him. Shirou runs from her and locks himself in a classroom. Shirou does the only magic he knows and fortifies a desk to protect against an attack from Rin. The whole school is being lit by this happenings, all this being watched by a mysterious character in the trees and the episode ends.

The battle is at the turning point, where Rin is about to be squashed by Beserker and Saber is unable to save her. As a last resort Saber decides to use her Noble Phantasm to defeat Beserker, no matter how it would affect her. Realizing that Saber could disappear from this, Shirou forces her to stop and decides to take matters into his own hands.The advancement of Shirou's character as we find what he is really able to do.

Shirou wakes up after having yet another dream of Saber's past and is clearly shaken up by what happened. That morning, during breakfast, Ilya is introduced by Rin as another person to be staying there for a while and Taiga seems to accept it well. Meanwhile there have been news on even more gas leaks, meaning that the Master at Ryudouji seems to be escalating his plans. While Shirou, Rin and Saber are planning what to do about this, Ilya enters the room with a great deal of information on this topic.

Shirou, Saber and Rin are at the steps to the temple.Assassin appears, he lets Shirou and Rin go past and fights Saber. Shirou and Rin head past Assassin and past him they see Sakura, in rather odd cloths who is in what seems to be pain as she is glowing red. She is in a pit arena area and as they prepare to go down there they are attacked from behind which Shirou notices and blocks the attack with Archer's swords. Souichirou appears and Shirou tells Rin to go ahead as he fights Souichirou and she goes to rescue Sakura. Meanwhile Saber and Assassin fight continues on. They compliment each other on being one of the best swordsmen they have ever faced and Assassin tells Saber that his identity, Sasaki Kojirou doesn't really exist. He is fabricated from people's minds of being a great swordsman so he is a fictional heroic soul. He says he has no desire for the Holy Grail therefore; his true desire is this, a fight with a worthy opponent.We find out more on the past of Rin & Sakura and how they once were bestfriends. Caster is watching this smiling says she just needs one magician for the sacrifice. Everything seems to be going as she had planned.

Saber's fight with Assassin and Shirou's fight with Souichirou reaches its climax. Souichirou shatters Shirou's blades again, sending him flying down to where Rin and Sakura are and it is upto Saber to defeat Assassin and make it down in time to save everyone. With Saber still affected by Caster's Noble Phantasm Rule Breaker, she isn't able to defeat Caster when all of a sudden their fight is interrupted by an unknown Servant. It seems that Saber is familiar with this Servant, but it turns out he's the eighth Servant in this Holy Grail War.In light of the appearance of the eighth Servant, Saber finally reveals to Shirou the shocking events of the previous Holy Grail War.