Prasanta Kumar Roy, son of BK Roy- an industrialist from the town of Lucknow, loves music and dislikes family business. His negligence towards work results in loss for the company. His enraged father comes home only to learn that his son is also secretly practicing music. He disapproves the idea. Prasanta leaves home in a bout and settles in one of his old bosom friend Asim's house in Calcutta. He starts singing there in radio and earns fame under the pseudonym of Abhijit Chowdhury. One day he suddenly comes across an anxious driver searching for a mechanic. He accompanies him to repair the car of a rich guy, Amrita Lal Majumder where he meets Sucharita, niece of Amritalal, and falls in love with her. He decides to appoint himself as a mechanic cum driver for Amrita Lal Majumdar, who lives with his niece, and assumes the name Hridoy Haran. Suchi is a smart girl but difficult to manage. Suchi also happens to be a great fan of singer Abhijit. She tries in various ways to meet Abhijit or to obtain a photograph of him, but singer Abhijit never gives any interview nor allows public display of photograph. Obtaining Asim's address from radio station as the sole contact address to Abhijit, Suchi visits them and gets friendly. She asks them to obtain a photo of Abhijit for her. In one such visits, she almost caught Prasanta on the spot. When Prasanta learns that Suchi is in love for Abhijit he decides to leave the service. Meanwhile Mr BK Roy engages police to find his son as his mother falls ill while grieving for her son. Meanwhile, Sukanta, a close friend and talented lyricist suffers from tuberculosis and has to be operated immediately. Prasanta decides to appear publicly in a show to fundraise the cost of treatment. Meanwhile, Roy and his wife arrive in Calcutta looking for their son. A police person recognizes Prasanta and asks Roy to be in the theater hall. In the meantime, Suchi buys 1st row tickets to watch singer Abhijit live for first time. As the curtain unfolds, Suchi gets astonished as she recognizes the man on stage to be their mysteriously disappeared driver Hridoy Haran, and she feels humiliated while bursting into tears. Mr Roy watches public reactions to his son's song and decides to change his mind. Police asks Prasanta to meet his parents. Before leaving Prasanta asks Asim to explain everything and apologizes to Suchi on behalf of Prasanta. Strangely the police car stops at the house of Mr Amritlal Majumder - where he worked previously. It turns out that BK Roy and Amrit Lal are known to each other for a long time and in fact Roy family are staying there as guests. Asim explained everything to Suchi, and Asim's wife proposes Suchi as bride for Prasanta to Mrs. Roy. But Amritlal rejects the proposal saying Prasanta is a driver and moreover his own driver. It turns out that he was joking and admits that he has no objection with the marriage, but only on one condition, that if Prasanta agrees to be a life time driver for Suchi.
