Dhana (Sumanth) is a dynamic graduate with a lifetime ambition to become a cop. But he wants it without giving any bribes. He befriends a beautiful girl Lakshmi (Saloni), who happens to be the daughter of honest and most powerful Police Commissioner Mahesh Chandra (Mukesh Khanna). Dhana and Lakshmi become best buddies over a period of time. Mahesh Chandra convinces Dhana to act as undercover police agent to book dangerous goons in the city. Dhana pretends as rowdy and give leads of other rowdies to Mahesh Chandra. Mahesh Chandra's plan is to have open jail for all these goons and rehabilitate them as good citizens. Just when Dhana completes getting 50 rowdies to the book, Mahesh Chandra does the act of turning around. He books Dhana as 51st rowdy as an act of revenge for attracting his daughter. The rest of the story is all about how Dhana 51 proves himself innocent and get back to Lakshmi.