A young girl who is unable to sleep asks her father to tell her a bedtime story. Although reluctant at first, he tells her a story of a fly named Nani.
Nani is a young man who specialises in preparing fireworks. He is in love with his neighbour Bindu, a micro artist who runs an Non-governmental organization (NGO). Bindu also feels affectionate towards Nani. Seeking to raise money for her NGO, Bindu visits the office of a rich, powerful industralist named Sudeep, who also finds her attractive. He befriends her, donates ₹1.5 million, and gains her trust. Sudeep sees Nani as a rival and plans to kill him. One night, Nani helps Bindu to finish a piece of micro art—a locket made from a pencil. While returning home, he is kidnapped and killed by Sudeep, who makes his death look like an accident. Unaware of the incident, Bindu proposes to the dying Nani by telephone; it is the last thing Nani hears before he is reincarnated as a housefly that cannot remember its previous life.
The fly's memory of its previous life is triggered when it encounters Sudeep and Bindu. Sudeep asks the heartbroken Bindu to accompany him to New Delhi to meet the education minister; if she can impress the minister with a presentation about the NGO, he might help Project 511 gain national recognition. The fly causes Sudeep to have an accident on his way to the airport and writes "I will kill you" on the windshield; t