How is the Story in Diablo III?

I’ve never been a fan of the Diablo series, but I’m also woefully undereducated on it. I played the first one for a short time and didn’t like it, but never bothered looking at the second. I have to admit I’m very curious about Diablo 3, and most curious in particular about the story in it, and in the series as a whole. Have you had any experience of it? Let me know in the comments!