Fuyuki City, Japan.
About every fifty years, a war for the Holy Grail takes place, called the Holy Grail War. The seven Masters and the seven Servants they summoned will form seven groups to fight each other. The only group that survives to be accepted by the Holy Grail is the last one. The seven Servants have different job profiles, namely Saber, Archer, Lancer, Berserker, Caster, Rider and Assassin. The Holy Grail War, which was originally intended to select the Holy Grail recipients and summon the Great Holy Grail, became increasingly difficult to successfully complete with the decline and retreat of Fuyuki's three major magic families and the modernization of the outside world.
This is the Holy Grail War on the other side.