Debt Collector and sometime-killer Roy (Ben Foster) senses that his boss, a dangerous, violent and pitiless loan-shark, wants him dead, and his next routine assignment is indeed a death-trap. Yet, what the would-be killers do to Roy is not the same as what he does to them. After a smoking spasm of violence, they are mostly dead and he is just about alive. Before making his getaway, Roy discovers young prostitute Rocky (Elle Fanning) hiding in the back room, and he sees something in her frightened, defiant eyes that prompts a fateful decision. He takes her with him as he flees New Orleans to Galveston - an action as ill-advised as it is inescapable. Rocky is too young, too tough, too sexy – and far too much trouble, especially when she makes a detour to liberate her 3 year old sister from the clutches of their seedy step-father. Like the smoke dancing upwards from a barrel of a gun, there's no way things are going to end well.