Rajan Mathur (Anil Kapoor) is a Urdu professor who lives in Chandni Chowkdistrict in New Delhi, with his wife Roma Mathur (Shefali Shah), who is a social activist and feminist, and their young daughter.
Professor Mathur meets Numair Qazi (Anurag Sinha), who informs him that he is a victim of communal riots in Gujarat. He is actually a suicide bomber of an Islamic fundamentalist group who has been ordered to set off a bomb near Red Fort during the Independence day celebrations.
Numair wins the trust of the professor and his wife. While assisting Numair to get an entry pass for the celebrations at Red Fort, Professor Mathur introduces him to people living in harmony in Chandni Chowk regardless of faith.