During Fuyuki City's Fifth Holy Grail War, seven mages summon Servants and fight until only one pair is left standing for a wish-granting cup. Shirou Emiya becomes an unwilling Master right after healing from a near-fatal wound, and the mage Rin Tosaka, who saved him, teams up with Shirou and his Servant Saber to investigate the conspiracies behind the war. This manga adapts the Unlimited Blade Works route of the original Fate/stay night visual novel.