After the death of his parents in a catastrophic fire, Shirou Emiya was raised by a mysterious sorcerer and had only just begun to learn small tidbits of magic. When he is caught in a battle between two powerful Magi, he performs a spell beyond his expected ability, accidentally summoning a beautiful woman knight to protect him. This incident thrust Shirou unwillingly into the Holy Grail War, a competition in which seven Magi, called Masters, alongside their spirit partners, the Servants, fight to acquire a powerful artifact said to grant every wish.