Firefly is set four hundred years from today in the Union of Planets, a government established after a bitter civil war. Under the leadership of Malcolm Reynolds, a renegade who fought against the new government, the crew of the Firefly-class vessel "Serenity" struggles to survive any way they can. They fly to the border planets to keep away from the Alliance and below it's radar. This series was described as a "science fiction western" but is different from other space-based shows as it features no aliens.

if you like Firefly, you will probably enjoy series creator Joss Whedon's other shows, Buffy the Vampire Slayer and Angel.