Here's how it is -- in a universe filled with hearts and minds as cold and dark as the reaches of space, one small Firefly-class starship named Serenity takes its ragtag crew of mercenaries, outlaws, and fugitives in search of a job, any job, that'll earn them enough cash to afford that most elusive commodity -- peace.Joss Whedon, creator of Buffy the Vampire Slayer, unveils a previously unknown chapter in the lives of his favorite band of space brigands in the prequel to the Serenity feature film -- the blockbuster followup to Whedon's cult-hit TV show Firefly.