I just got back from seeing Serenity.
It’s a movie based on a TV show named Firefly written by Joss Whedon (he also did Buffy the Vampire Slayer and Angel), about a crew aboard a spaceship that … does things. There’s an overarching plot about a mysterious girl, and – oh, forget it. Just go watch the series. There’s only 12 or 13 episodes.
When you’re done, go watch the movie. You can watch the movie without seeing the episodes, but you’ll like it a whole lot more after seeing the episodes.
I don’t often gush about things, but consider this movie gushed-upon.