As Sakura drowns in the murky darkness of the sins she has committed, Shirou’s vow to protect her at all costs leads him into a raging battle to put an end to the Holy Grail War. Will Shirou’s wish reach Sakura even as he challenges fate itself in a desperate battle against the rising tide?

January 1999: Apprentice mage Azaka Kokutou, Mikiya’s younger sister, has been ordered by her mentor, Touko Aozaki, to investigate a certain incident in which fairies steal the memories of students at Azaka’s school, Reien Academy. Azaka launches an investigation with the help of Shiki.