A true classic. A Vietnam vet has taken to the streets of New York as a taxi driver, using the job as a way to deal with his ongoing ordeal of not being able to sleep. We watch as the bitterness of this character come to a head. Disgusted by the 4 of society he decides to take things into his own hands. All the while DeNirro narrates his diary entries, which seem to grow in their bitter nature as time goes on. Truly stellar.