The film is narrated in a flashback. Diti’s (Rituparna) daughter is singing the title-song by Lata Mangeshkar at a school function. A Catholic priest (Firdaus) fills in the lines when she forgets them somewhere along the way. Her mother, who did not attend the function, is surprised to learn about the priest who knew the lines of her song as a young girl she sang along with Akash, her childhood friend. The film moves into flashback to narrate an age-old, hackneyed story about Akash who loves Diti but she does not love him. She falls in love with the village doctor Diganto (Amitavo Bhattacharya) and becomes pregnant. Diganto, not knowing that Akash is in love with Diti, asks him to propose to Diti’s father on his behalf. On the day of the wedding, however, the villains of the village drown him in the river. Diti is told that it was Akash who murdered Diganto because he could not marry Diti himself. Diti, forced to marry Akash, hates him and accuses him of killing her husband. He leaves her to become a Catholic priest. Diganto surfaces some years later and clears the tainted name of Akash. The husband, wife and daughter live a contented life but for the sad fact that they cannot locate Akash to ask for his forgiveness.