The plot was not full of unexpected twists, but it did have some underlying messages that are there for the taking if you care to think past the mayhem that fills the screen. The film was a cross between the sci-fi novels that my father grew up reading and the cowboys vs indians movie that he watched as a child -- except the indians are no longer the "bad guys" here. It would not have succeeded had it not been an immersive enviornment -- but it was, and i am going to see it a second time with another set of friends.