The central premise of the film rests upon the relationship between Munna Bhai (Sanjay Dutt) and the image of Mahatma Gandhi (portrayed by Dilip Prabhavalkar) who teaches him the principles of Gandhian philosophy. Munna is helped by his sidekick, Circuit (Arshad Warsi) who speaks with him in Bambaiya Hindi, a dialect specific to the Indian city of Mumbai. At the beginning of the story, Munna is in love with the voice of Janhavi (Vidya Balan), a radio jockey. He devises a plan to meet her when she announces a contest featuring the life and beliefs of Mahatma Gandhi set for 2 October—Gandhi Jayanti, a national holiday celebrating the birth of Gandhi. Circuit helps Munna win the contest by kidnapping and then bribing a group of professors. As the winner, Munna is granted an interview with Janhavi wherein he presents himself as a professor of history and a Gandhi specialist. Janhavi subsequently asks Munna to present a lecture on Gandhi to a community of senior citizens who live in her home, called the "Second Innings House". In order to prepare for this event, Munna engages in a period of intense study at a Gandhi institute. For three days and nights (and without food or sleep), Munna reads about the life and ideologies of Gandhi.