Fate/stay night: Unlimited Blade Works - Prologue

This story focuses primarily on the heroine Rin Toosaka. After her father's death, Rin enters the Holy Grail War as the sole heir to the prestigious Toosaka Household, with her servant Archer. But, she soon finds out that Shirou Emiya, a boy from her high school has gotten himself involved in the battles and unexpectedly saves him when he is fatally injured. Special episode of "Fate/Stay Night: Unlimited Blade Works" anime series. (Source: MyAnimeList)