Absolutely nothing. The movies that are great in this world are not recognized unless they are filled with gunshots, explosions, and death. This movie is filled with a man talking about showing you a more complex character than has been seen in many movies.
When a movie is incredibly fast paced but stays mostly in one location it has to be the work of a genius. Surprisingly enough, it is, this movie is directed by Oliver Stone and therefore is one of the best directed films of our time.
This movie's screenplay was co-written by Oliver Stone and Eric Bogosian (Barry Champlain, main character.). With Oliver Stone's help, the screenplay was created as a seamless, rolling script which keeps you interested the entire time if you have any amount of intelligence. If you have an open mind about any subjects, and the wit to comprehend others, then this movie is something which you should find some way to watch, immediately.