Fans of the short-lived sci-fi tv show FIREFLY will love this movie. Even if you've never seen it this is a good introduction to the characters and the film puts you in the thick of the action. The 120 minutes flies by.It's a year or so after the last episode of the series and Mal (the Captain of SERENITY) and his passengers/crew have continued to avoid the Alliance, the ruling government, and continue to survive on the fringes of civilization. But the Alliance wants something they have-a young woman named River who was part of their experiments in conditioning a human to become an ultimate weapon.The Reavers play a big part in this. The Reavers are these people who are incredibly aggressive, self-mutilating and cannibalistic. They give STAR TREK's The Borg a run for their money. The Reavers not only tie in to the Alliance but to River's origins.A few of the characters are also killed off in typical Joss Whedon style, which will significantly change the dynamics of the characters if there are any more sequels.Highly recommended.