Prasanta Kumar Roy [Uttam Kumar], son of BK Roy [Kamal Mitra], is an industrialist from Lucknow who loves music but harbors a strong dislike for the family business. His chronic neglect of work starts to cost the company, and when his furious father returns home, he discovers that Prasanta is secretly pursuing music. The confrontation drives Prasanta to leave home in a burst of rebellion and seek refuge with an old friend, Asim, in Calcutta (Kolkata). There, he reinvents himself as a radio singer under the alias Abhijit Chowdhury and quickly earns fame, living a double life that both exhilarates and unsettles him.
In Calcutta, fate intervenes in a surprising way. Prasanta’s path crosses with Sucharita Majumdar [Tanuja Samarth], the formidable niece of Amritlal Majumder [Pahadi Sanyal], when a chance encounter during a car repair leads him to a new ambitions future. He begins to present himself as a mechanic and driver for Amritlal’s household, assuming the name Hridoy Haran, a “heart-stealer” who wins Suchi’s attention and curiosity. Suchi is bright and spirited, a fan of Abhijit, yet she is also wary and independent, determined to meet the elusive singer or at least obtain his photograph. Abhijit never grants interviews or permits his image to be released, which only makes Suchi more determined. Using the radio station’s address as the link to Abhijit, Suchi slips into their world, befriending the people around Asim, and she asks them to obtain a photo of Abhijit for her.
During one such visit, Suchi almost catches Prasanta in the act, and the moment deepens the tension between their worlds. When Prasanta learns that Suchi’s adoration is directed at Abhijit, he makes a painful decision to step back from his job, choosing prudence over passion and intending to avoid complicating Suchi’s feelings. Yet the drama surrounding Prasanta’s dual life intensifies. Back home, BK Roy and his wife worry about their missing son, and the police are enlisted to help. The mother’s illness and the plight of Sukanta, a close friend and gifted lyricist who battles tuberculosis, add to the mounting pressures on Prasanta’s already tangled life.
To help fund Sukanta’s treatment, Prasanta agrees to appear in a public show, a fundraiser that would throw his hidden identity into sharper relief. As the Roy family arrives in Calcutta in search of their son, a police officer spots Prasanta and directs Roy toward the theater where the performances unfold. Suchi, meanwhile, purchases front-row seats to witness Abhijit live for the first time, unaware that the man on stage is the very driver who vanished from her life. When the curtain rises, Suchi recognizes the singer as Hridoy Haran, the same man she met in Amritlal’s circle, and she is overwhelmed with humiliation and tears.
Witnessing the public reaction, Mr. Roy’s stance begins to shift. The police request that Prasanta meet his parents, and before departing, Prasanta asks Asim to clarify everything and offers a formal apology to Suchi on his own behalf. In a twist of fate, the police car stops at Amritlal Majumder’s house, where the Roy family had once stayed as guests. It turns out that BK Roy and Amritlal have known each other for a long time, and the Roy family remains under the same roof as guests.
Asim pieces the truth together for Suchi, and Asim’s wife Lily Chakravarty suggests a possible alliance: marrying Suchi to Prasanta. Amritlal’s response is revealing and affectionate—though he initially frames a caution, he ultimately signals that there is no real objection to the union, provided a single condition is satisfied. The bold caveat is that Prasanta must accept a lifelong role as Suchi’s driver, cementing a bond that intertwines love, music, and duty in a way that neither man nor audience could have anticipated.
