The holy grail warfare is a battle royale amongst seven magi who serve as masters. Masters, through the use of the command seals they may be given when they enter the warfare, command heroic spirits known as servants to combat for them in conflict. Inside the fifth holy grail conflict, rin toosaka is the various magi getting into the competition. With her servant, archer, she hopes to gain the ultimate prize the holy grail, a paranormal artifact able to granting its wielder any desire. Certainly one of rin’s classmates, emiya shirou, by chance enters the competition and finally ends up commanding a servant of his very own referred to as saber. As they find themselves facing mutual enemies, rin and shirou determine to form a transient alliance as they assignment their combatants inside the holy grail struggle.