Based off of the visual novel, Fate Zero is the prequel for the critically acclaimed visual novel (and mediocre anime) Fate/Stay Night. This anime focuses on the fourth Grail war, where 7 masters and 7 legendary figures ("Servants") fight for the ultimate wish-granter: the Holy Grail. It's rather hard to talk about this anime without spoiling everything (which is something you DON'T want with this anime, the surprises are amazing!), but I will say this: there is NOTHING this anime sets out to do that it does wrong. Nothing. All the characters are relatable, the music and visuals are amazing, and RIDER IS THE MOST AWESOME ONE OF THE WHOLE DAMN BUNCH! Watch for him alone, if for no one else.