Throughout the Fate franchise, pairs of masters and heroic spirits —also known as servants— have been fighting across history in a series of Holy Grail Wars, with the winning duo receiving an ancient artifact that grants wishes.

Fate/Samurai Remnant continues the series’ epic Holy Grail War in the fourth year of the Keian Era, Edo Period Japan. It has been several decades since the end of a turbulent, blood-soaked era, and while the people are finally enjoying peace and tranquility, a battle between seven pairs of masters and servants is about to begin as the “Waxing Moon Ritual” unfolds in the shadows. This is where the game’s hero, Miyamoto Iori, a young man in Asakusa, finds himself caught in the violence alongside his servant Saber, as they fight to be the last pair remaining in order to receive the granter of wishes, the “Waxing Moon Vessel”.

The 4th year of the Keian Era, Edo Period. It has been several decades since the end of a turbulent, blood-soaked era. People were enjoying peace and tranquility. But, a battle between seven pairs of Masters and Servants is about to begin, as the "Waxing Moon Ritual" unfolds in the shadows. Miyamoto Iori, a young man in Asakusa, finds himself caught in the violence of a Holy Grail War.