The Holy Grail War. A great ritual that materializes the greatest holy artifact, the Holy Grail. There are two conditions to participate in this ritual. To be a magus, and to be a "Master" chosen by the Holy Grail. (The experience as a magus is not questioned if one has the aptitude) There are seven chosen Masters, and seven classes of Servants. There is only one Holy Grail. If you wish for a miracle. Prove that you are the strongest with your powers.