The final chapter in the Heaven's Feel trilogy. Angra Mainyu has successfully possessed his vessel Sakura Matou. It's up to Rin, Shirou, and Rider to cleanse the grail or it will be the end of the world and magecraft as we all know it.

The story focuses on the Holy Grail War and explores the relationship between Shirou Emiya and Sakura Matou, two teenagers participating in this conflict. The story continues immediately from Fate/stay night: Heaven's Feel I. presage flower, following Shirou as he continues to participate in the Holy Grail War even after being eliminated as a master.