Hailing from a prestigious lineage of magi, Ayaka Sajou is destined to join the Holy Grail War. Haunted by the loss of her father and sister in a past conflict, she shies away from the deadly competition that claimed her family. Against all odds, Ayaka faces peril when a knight threatens her, leading her to summon the formidable Saber as her loyal Servant. Embracing her fate, Ayaka reluctantly enters the very battle she sought to evade, thrust into a world of magic and danger.