In the future time travel is invented, and then immediately outlawed. The only people who use it are criminal syndicates that throw their bad guys back in time to be killed when they are done with them. This movie is the story of one of those criminals, back in time when he was a Looper, the hired hand that kills the criminal when they go back in time. Even though it sounds a bit confusing, its not as time travel obsessed as you may think. In some ways, this movie is a metaphor for Karma. If Sci-Fi is your thing, this is a good film to check out.