To save, to protect, those are the ideals that represent those known as Emiya Shirou and Emiya Hari. In the fire that consumed Fuyuki city Kiritsugu found them amidst the destruction and raised them as his sons. But the price of salvation isn't small and soon the Grail War will begin again. What price must be paid for salvation this time?

The summer following Harry Potter's fourth year signals the start of the Holy Grail War in Britain and the summoning of the mysterious Servant Saber to aid him. Who are the other Masters? Where are they hiding? Can the Holy Grail really grant him his wish? One thing is for certain: he could certainly do with a hero now...