Shirou continues his training with Saber. She is glad that his abilities have improved, but there is something different about his technique. Meanwhile, Rin suspects there is a fourth Master at school.

Archer finally arrives at the scene in the school. Rin fills him in on what happened. Together with Shirou and Saber, they plan to find out who the real Master of Caster is. After losing Rider, Shinji heads to the church!

Rin suspects Kuzuki might be the Master of Caster. With the help of a hesitant Shirou, she implements a dangerous plan in a remote location to test out her theory.

After making progress with the development of his projection magic, Shirou starts experiencing the side effects of having pushed his body to the limit.

Rin finally asks Shirou out on a date, but their enjoyment is cut short when Caster makes her move. Shirou is forced to make a difficult decision to protect the people he cares about.

Caster keeps Saber hostage, but Kuzuki is not happy with his Servant calling her own shots. Rin, determined to take out Caster and her Master, orders Archer to take out Kuzuki. Will Archer do as she says?

Rin is helpless now in Kirei's hands, while Shirou faces Archer. Is he skillful enough to defeat Archer?