The film opens with a drama performance by the group theater Swapnochari. Deepa Bhatta, Konkona Sen Sharma, is the star of the evening, yet a hollow ache shadows her smile even as the audience cheers. The following week, she is married off to Debashish Bhatto, a young industrialist who is handsome, affluent, and supportive of the arts, and this wedding marks what should be a turning point in her life and career. Deepa does not object to Debashish; he is all the things a girl could want, but her heart belongs to someone else, a truth she cannot reveal to her family for fear of upheaval and shame.
Nripati Laha, founder of the troupe, and Deepa's brother Vijay look at the alliance as a strategic move that could secure their future. Nripati hopes that Debashis's Bhatta Group of Industries will become a reliable sponsor, backing Swapnochari and its productions. Yet not everyone is pleased. Prabal Gupta, the troupe’s director, is furious about the arrangement, feeling a deep sense of ownership over Deepa’s artistry—he believes he molded her into the star she has become, and her departure would sever the thread he has carefully woven. The wedding proceeds on schedule, with all members of the group in attendance, donning joyous façades while Debashis admires his beautiful bride, even as a nagging unease lingers in his eyes.
That night, the couple’s new life begins with an uneasy quiet. Deepa, though courteous and composed in public, withdraws into herself in private. She resists meeting family members and mostly stays within the confines of their home. Then an anonymous gift arrives: a striking pair of designer earrings made of a horn-like material. She wears them out of curiosity, finding them oddly compelling. Soon after, Debashish presents her with a mobile phone, a gesture meant to reassure her and keep her connected to friends. Slowly, Deepa starts texting from an unfamiliar number, a move that hints at the secret she guards. Meanwhile, a dark thread begins to weave through Kolkata: a beggar is killed on the streets, the weapon a porcupine quill driven through the heart from behind. The murder is shocking in its method, but the city treats it as just another brutal incident in a metropolis that already bears its share of crime.
One person notices the odd crime with particular clarity—Byomkesh Bakshi, a keen observer who makes a habit of scanning every morning newspaper for overlooked stories. He shares his thoughts with his trusted friend and assistant Ajit, aiming to understand how the city’s killers are getting more creative. Byomkesh’s attention is quickly drawn to the porcupine quill murder, a detail that could be a clue to a larger pattern, and he receives a call from the Kolkata police (the DC DD) requesting his help with the case. The detective’s curiosity is sharpened not just by the grisly murder but by the sense that something bigger is at play.
As the days unfold, Deepa’s unusual marriage life continues in a careful, formal cadence. The couple maintains a courteous, distant cordiality, sharing space but not intimacy. She remains largely isolated, refusing visitors and staying close to home, while the gifts she receives—especially the horn earrings and the discreet phone—trigger new questions about who might be reaching out to her and why. The city watches with growing dread as the murders recur, each one more enigmatic than the last, with the media covering the terror with growing fervor. Kapil Bose, Subrata Guha Roy, the metropolitan editor, is thrilled by the sensational angles the crimes provide and keeps the narrative moving with relentless updates.
Against this backdrop of personal turmoil and a city-wide mystery, alliances in Swapnochari begin to strain. Nripati Laha’s hoped-for sponsorship conversation clashes with Prabal Gupta’s insistence on the troupe’s artistic integrity, and Deepa’s private life becomes a focal point for suspicion and rumor. The whispered question of whether the two tracks—the unhappy marriage and the string of bizarre murders—are connected lingers in the air, even as Byomkesh Bakshi follows each clue with patient precision. The porcupine quill murders press forward, the public’s fear deepens, and the investigation presses toward a truth that tests loyalties, art, and love itself.
Throughout, Deepa’s silence and the strange gifts she receives hint at a secret that could redefine her destiny and the fate of Swapnochari. The film weaves together the personal cost of a forced union with a city’s obsession over a mysterious killer, showing how art, power, and desire collide in a web of motive and misdirection. As Byomkesh and his colleagues dig deeper, the audience is left with the sense that every gesture—every performance, every gift, every message—might be a step toward or away from a revelation that could change everything for Deepa, Debashish, and the troupe they all depend on.
