The battle between the Masters and Servants for the omnipotent wish-granting machine known as the "Holy Grail"――"Holy Grail War" ensues. The battle is distorted.

Sakura Matou had committed a crime and finds herself consumed in the gloomy darkness.
The young boy, Shiro Emiya, who swore to protect Sakura at all costs, involves himself in a dreadful battle to end the "Holy Grail War" together with Tohsaka Rin.

Illyasviel von Einzbern as the person who knew the truth of the battle, faced her fate as Zouken Matou is using Sakura to gain his own personal wish. She warns Sakura of the troubles ahead..

"Therefore──grit your teeth, Sakura"

Will the young boy's wish reach the young girl after facing a fierce storm and challenge his fate?
The end of the "Holy Grail War"──
The curtain of the last battle has finally open.