Saathi is an action crime drama. The movie revolves around two best friends - Suraj (Aditya Pancholi) and Amar (Mohsin Khan). The two grow up following the path of crime and con people to make living. Later, they are recruited by a dreaded gangster named Pasha (Paresh Rawal). He asks the duo to kill a man, who is soon going to testify against him. However, this doesn’t go well with Amar, as the gangland doesn’t tempt him much, thus Amar and Suraj part their ways. Amar then becomes a police informant, while Suraj keeps getting entangled in the world of crime. Will Amar be able to save his best friend?