I'm new to the franchise after Fate/zero. From what I understand, fate stay has three routes with different heroines. I know fate stay night has saber. I know unlimited blade works has rin. I know heaven's feel has sakura. I know the route seems to branch into these different stories at some point in time and different things happen in different routes. At first I thought it was just about showing the same story from three different perspectives, but that doesn't seem to be the case. Different hings happen to the characters. Is there any plot related reason for the split into three different tellings? Something to do with the grail? Is there cohesion? Are heaven's feel, fate stay night and unlimited blade works three different stories unrelated to each other but set in the same time? With minimal to no spoilers, what's up with the routes for an anime only watcher who only started with fate/zero? I know this series started out as some kind of interactive game, but as an anime, it seems strange to think there's going to be three wildly different versions of the same time period with different heroes having different things happen to them and they have no relation to each other.