"Gen Urobuchi and Shinjiro's prequel to Type-Moon's Fate anime and novel saga begins ... and the Fourth Holy Grail War is underway! Seven mysterious magi must summon heroes from history to battle each other to the death, but only one magi-and-hero pair will remain to claim the Grail and have their wishes granted! Kiritsugu Emiya was once an assassin but now fights in this war to save the world from those who would destroy it with the Grail's power. He and Saber, his summoned servant, are willing to sacrifice everything to achieve victory ... no matter the cost!"--Page 4 of cover.