Lili (Indrani Haldar) and Mili (Rani Mukerji) Chatterjee are two sisters who are as different as night and day. Lili is mature and reserved and has spent her life taking care of her little sister Mili. She also runs the family business with the help of her friend and general manager Ashit Mukherjee (Sabyasachi Chakrabarty). Mili is a carefree teenager. Their grandmother, who they lovingly call Thama, dreams of Lili’s marriage, but she has no interest in marriage and asks Thama to concentrate on getting Mili married.
Meanwhile Mili falls in love with Athanu Mukherjee (Prosenjit Chatterjee), a famous music teacher from a local college who is 7 years older than her. After briefly courting him, Athanu falls in love with Mili too. One day Ashit sees the couple together and Mili explains that she and Athanu are in love. Ashit promises to talk to Lili about Mili’s marriage to Athanu once he returns from a trip where he will go to see his parents and then he will go on a pilgrimage. Before he leaves, he convinces Lili to hire Athanu as Mili’s music teacher. While with his parents, Ashit admits that he loves Lili and intends to discuss their marriage once he returns.
Lili is enamored with Athanu and his music since the moment she meets him. She is even more impressed when Athanu sings a song she wrote on television. When While Mili is on a tour with her school, Thama finds out that Lili has softened to the thought of marriage, she calls Lili’s uncle to town and asks him to arrange Lili and Athanu’s marriage. Athanu’s mother, not knowing that her son is in love with Mili, agrees to a marriage between Athanu and Lili.
Mili is ecstatic to hear of her sisters impending marriage, especially because she thinks it will clear the way for her marriage with Athanu, but is heartbroken when she finds out that her sister is in love with Athanu. Mili remembers the sacrifices that Lili has made for her and her family and decides to sacrifice her love for her sister’s happiness. She begs Athanu to marry Lili. Athanu’s mother asks him also to marry Lili as she has already given her word to Lili’s uncle. Athanu reluctantly agrees.
During her wedding celebration, Lili notices slight differences in Mili’s outlook and temperament. On her wedding day, Lili prepares to go to the altar as Mili reminisces her time with Athanu. As she is being carried to the altar with her face covered, Ashit arrives. Believing the bride to be Mili, he reprimands her for not waiting for him to come back. When he realizes that Lili is about to marry Athanu, he takes Lili to a side and tells her that Mili and Athanu are in love. Lili finds Mili and dresses her like a bride and takes her down to the altar. When Lili says that she is not fated to get married, Mili vows to not marry until Lili marries. Ashit intervenes and tells Lili that he wished to marry Lili. Lili is surprised to hear Ashit’s declaration and the sisters have a double marriage.