The planet is collapsing, no longer capable of sustaining life today. The Ainsworth clan could employ the Holy Grail to rescue humanity, yet salvation demands the sacrifice of the enchantress Miyu—yet her brother Shirou refuses to surrender her without resistance. It falls upon Illya to intervene and devise a plan that preserves both Miyu and the entire world from looming catastrophe, for humanity's survival and hope. But if the cost of saving the globe is one innocent girl's life in the face of imminent peril, what decision will Illya make?
