Kaori Aso lives in the wealthy family. She cheated her stepmother that she has been kidnapped by somebody. Unfortunately, Aso's accomplice really does kidnap her and her stepmother.

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?