Much about Serenity I know, young Padawan. The original Firefly was a TV series that ran for 1 season only, I believe 2003 or 2004. It was created by Joss Wheadon, the mastermind behind several other beloved shows including "Buffy the Vampire Slayer" and "Angel". It was set about 500 years in the future and the opening credits always had the same monologue which gave us the following Info.
The year is 2550 (thereabouts). Earth was "used up". People had to go find a new Galaxy and populate it. The "Alliance" tried to rule the Galaxy. There was a rebellion, which lost. (Now that I'm writing this it seems alot like Star Wars, yet if you watch the show it's nothing alike).
The whole show has a wild-west type theme to it, with a good combination of advanced technology and backwoods primitivism.
The Serenity is a "Firefly" class transport spaceship, Captained by Malcolm "Mal" Reynolds. His first mate is Zoe, a hot chick who is tough as nails and who he fought with during the rebellion. Wash is the amazing pilot and is also Zoe's husband. Jayne is a tough ass sumbitch (you would be too if you were a guy with a name like Jayne). Inara is a world-class hottie who plays a "Companion", more along the lines of a cultured Geisha as opposed to a common whore. Kaylee is a cute chick who is the engineer without par and who keeps the Serenity going with spit and bailing-wire. Shepherd is just that...a future priest...who also has some surprising talents. Finally we have Doctor Tam and River Tam, a brother/sister combination on the run from the alliance. River has some amazing talents after being operated on by the Alliance but has been reduced to a state of autism, for lack of a better word. Sometimes she is quite normal, other times she is loopier than hell.
The Serenity movie will be released 30 Sep in Canada and the US and the plot will take us deeper into the River story and the Alliances search for her.
This is one movie that I will gladly fork over my $85 at the theatre to see. Holey S**t!!! I just noticed how much I wrote...shouldn't I be working?
Hope this helps!