Shirou Emiya lost his parents in a fire when he was young and was later adopted by a sorceror by the name of Kiritsugu Emiya. Years later, he is pulled into the Holy Grail war as a "Master" and is given a female "Servant" known as Saber in order to protect himself. Now, they must fight numerous "Servants" from different classes known as Archer, Rider, Berserker, Lancer, Caster and Assasin, whether they want to or not...