Facebook Lawsuit? what's the deal!?

[Joe]

With the movie the social network having come out and putting the whole Facebook/ Mark Zuckerberg Scandal in the spotlight, and new evidence recently coming out, I decided it was time for me to figure out what the heck was actually going on! What happened with the scandal/lawsuit? Who sued who for what and why? Who won? Who's fault was it? What started it all? I'm so confused. I know that some guy claims he owns part of Facebook but Mark Zuckerberg says that he doesn't. What is the whole deal? What is the case all about?! Thanks!