Born in Delhi, but now living in Mumbai, Karthik Narayan is a beleaguered employee at ACL Construction who endures regular mistreatment at work. He keeps a quiet crush on the talented architect Shonali Mukherjee, a woman who seems to have moved beyond him with another coworker, Ashish. At the same time, his relationship with his hard-edged boss, Mr Kamath, is strained: Kamath is quick to credit others for wins and harshly criticizes Karthik for not closing deals, even as Karthik quietly racks up several completed contracts in the previous year.
The daily grind wears on him. Karthik is the go-to person for office paperwork, burning the midnight oil to prepare urgent contracts for a single client, only to be told that he was supposed to prepare for two. The late nights take a toll, and when the pressure peaks, he smashes his home phone in a moment of frustration and must replace it. The strain doesn’t stop there—an overbearing landlord, Karthik's Landlord, exploits the situation by withholding funds from his apartment deposit and demanding even more cash, leaving Karthik financially squeezed and emotionally battered.
A deeper burden lies in Karthik’s childhood: a credibly painful memory that he blames himself for his brother Kumar’s death. His parents never believed his claims of abuse by Kumar, who once dragged him toward a well. Karthik escaped, but Kumar fell in and died—an event that lingers as a source of guilt and a barrier to asserting himself as an adult. The weight of this past haunts him, coloring his self-esteem and his response to authority.
Karthik’s life takes a sharper turn when he seeks therapy. He confronts the fear that he is unworthy of happiness and confronts the idea of asking for an apology from his boss, only to be met with ridicule in front of the entire office. The humiliation drives him to the brink of desperation, and he contemplates ending his life. In the moment of despair, a stranger with the same voice as his own contacts him, claiming to be another Karthik who can change his life. The initial doubt is quickly replaced by curiosity as the caller provides intimate details about his life. A crucial turn comes when the office’s Telephone Exchange Clerk reveals that Karthik never actually received a call, throwing the mystery into sharper relief.
This mysterious voice—seemingly impossible to ignore—begins to guide Karthik. He is instructed to say no, to set boundaries, and to reinvent his appearance and demeanor. With the caller’s coaching, Karthik undergoes a transformation: he develops new confidence, earns a fresh sense of control, and even uses insider knowledge to manipulate a few situations to his advantage. His rising self-assurance translates into a professional upswing, and he soon gains a promotion by convincing his boss that the agency’s projects are flawless and compliant with complex government rules—something his colleagues could not match.
As his life starts to tilt toward success, Karthik’s relationship with Shonali Mukherjee grows warmer. He seizes the opportunity to remove a rival, [Ashish], by threatening to expose his personal life to Shonali, and the two grow closer. Shonali’s affection signals a possible future together, but the escalating glow of his new persona begins to clash with the truth behind the calls. When she learns that Karthik receives guidance from a mysterious voice, she urges him to seek professional help. He agrees and consults Dr. Shweta Kapadia, a psychiatrist who practices with care and seriousness. The consultation touches on the unsettling possibility that Karthik’s problem may be rooted in something that several therapy sessions cannot simply fix, hinting at a different diagnosis.
The twist lands hard and fast: Dr. Shweta Kapadia needs to confirm a startling reality—Karthik is unknowingly grappling with a schizophrenia spectrum condition. The entity behind the calls is revealed to be an alter ego forged by Karthik himself, a voice born from long-buried memories and self-doubt. The apparent stranger with the same voice is, in truth, a manifestation of Karthik’s psyche, using his own phone’s ability to record messages to wake him at 5:00 AM and deliver the messages he has left for himself. The narrative deepens with the insight that Karthik’s imagined brother Kumar was a creation from childhood, explaining why his parents remained skeptical of his stories.
In the wake of this revelation, Karthik faces a perilous moment when the calls threaten not only his career but his life. Shonali realizes the truth and rushes to him just in time as he confronts the full weight of his condition. The couple confronts the challenge together, and Shonali stands by him as he begins the long process of treatment and rehabilitation. Over the following months, Karthik works to live with schizophrenia, guided by therapy and a supportive partner, gradually finding balance and the possibility of a happier, more stable life with Shonali by his side.
Throughout the journey, the tension between illusion and reality remains a driving force. The film threads together themes of workplace pressure, love, mental health, and the delicate boundary between genius and fragility. It invites viewers to consider how fear, memory, and the need for connection shape the choices people make when confronted with overwhelming stress. Ultimately, the story leaves us with a cautious, hopeful note: healing is possible, and shared support can help steer a life back toward equilibrium, even when the voice from within continually tests the limits of what is real.
