The movie starts with Chinni (Nagarjuna) revealing, on a train journey from Pune to Hyderabad, that he just got out of jail after seven years. His past is revealed in a flash back.
He had been a singer, waiting for the big break. Indu (Simran Bagga) hears his voice, though she doesn't see him and becomes his fan. When Chinni realizes this, he tries to reveal who he is but circumstances place him and Indu in situations where she ends up thinking that he is a rowdy. Chinni ultimately becomes responsible for her losing her eyesight too.
He devotes himself to her from then onwards attending to her every need. She learns to respect and love him too, thinking that he is the singer and not knowing that he is the same person she thought was a rowdy.
When a street-smart FBI agent is sent to Georgia to protect a beautiful single mother and her son from an escaped convict, he is forced to impersonate a crass Southern granny known as Big Momma in order to remain incognito.
Gary is a former gangster who has made a modest amount of money from his criminal career. Happy to put his life of crime behind him, he has retired with his wife Deedee to the sunny bliss of rural Spain, where he lives an idyllic life with his family and a few close friends.
With computer genius Luther Stickell at his side and a beautiful thief on his mind, agent Ethan Hunt races across Australia and Spain to stop a former IMF agent from unleashing a genetically engineered biological weapon called Chimera.