The film opens on a rainy night with a tense moment: a woman trying to hire an auto notices an unconscious girl slumped in the backseat, phones the police, and then is chased by the driver. The mood is moody and unsettled, setting the stage for a mystery that spirals through a city’s shadows.
Cut to a New Year’s beach celebration where a cardboard box atop a parked car draws the crowd’s attention, and a second box is found in a park. Inside these ominous parcels are amputated arms, and the case lands with CB-CID’s Senior Inspector J.K., [Cheran], a brooding ex-cop who has his own personal beacon beyond the crime scene: a search for his sister Charu, [Iniya], who vanished six months earlier. Two junior officers, Prakash and Tamilselvi, [Dipa Shah], are assigned to assist him as he dives into the grim puzzle.
At the morgue, the team meets Judas Iscariot, [Jayaprakash], a medical examiner who speaks in a slightly esoteric tongue and often likens J.K. to the philosopher Jiddu Krishnamurti. The discovery begins to crystallize when J.K. can identify one set of hands as belonging to an auto driver named Moorthy and follows that lead to a middleman, Rajamanickam, whose fate is brutal—his hands are amputated and displayed in a subway crossing. A local tip about Rajamanickam’s bike leads J.K. to a lodge in Triplicane, only to find Raghu dead in a room and a city streets chase that ends with the man he pursues slipping away.
Meanwhile, a separate thread widens the frame. John Britto, a missing man who once stayed with Raghu, appears in interviews as someone who damaged Dr. Purushothaman’s family’s reputation—an accusation that snowballs into a broader investigation into a supposed September suicides of the Purushothaman clan. Dr. Purushothaman, [Y. G. Mahendran], and his wife Annapoorni, [Lakshmi Ramakrishnan], along with their household, are pulled into scrutiny. The family’s past is muddied by whispers that Manikandan, a lab attendant, vanished around the same time as John Britto, while a daughter named Suja, [Srushti Dange], disappears on the exact date Charu did, tying the two cases together in a web of tragedy.
A crucial clue arrives in the form of a green Qualis, a vehicle that thwarts kidnappings by pulling off stranger abductions and delivering a different threat. Tamilselvi, studying old Purushothaman case files, uncovers that Purushothaman had a daughter named Suja who vanished on the same day as Charu—September 6. J.K. presses the dodgy inspector Isakki Muthu, [G. Marimuthu], for details and then confronts Duraipandi, [Manikka Vinayagam], a powerful textile shop owner who was once accused of peeping through a hole in his office. Duraipandi’s attorney-like maneuvering and a nod from a previous manager Nadhamani push the case toward a Rashomon-like pattern: multiple people offer conflicting versions, and the truth seems fluid.
J.K. secures a major lead when he discovers there were two people in the auto rickshaw that took Suja, mirroring the disappearance of his own sister Charu. The investigation reveals that ACP Thirisangu, [Selva], along with Isakki Muthu, Duraipandi, Sharif, Inba, [Yugendran], and a slate of missing men—Nagu, Moorthy, and Rajamanickam—are all entangled in a larger conspiracy. Thirisangu uses his power to push back against J.K., and Sharif is kidnapped by the same Qualis, tortured, and eventually executed after providing names of several suspects.
A new box containing severed arms surfaces at a club used by two of the named men, and Sharif’s head is discovered outside Isakki Muthu’s police station. J.K. pieces together that the operations all funnel through ACP Thirisangu and his circle, with Chandramouli, [Aadukalam Naren], unwilling to permit inquiries that could uncover higher pressures from above. Unable to act further, J.K. asks for a gun permit.
The stakes rise when it’s revealed that Charu is being held by Thirisangu and is connected to the woman in the opening scene. The Qualis reappears, attempting to kidnap Isakki, but J.K. intervenes and a tense pursuit unfolds in a dark underground car park. Tamilselvi survives a car crash and, once awake in the hospital, reveals that there were two black-clad figures inside the vehicle—one of them a woman. After rescuing Isakki Muthu, Thirisangu pieces together that Purushothaman’s family may not be dead after all. An air-conditioning grill modified from outside the Purushothaman bedroom hints at a meticulously staged “suicide.”
In a dramatic party confrontation, Judas arrives with a willingness to trade information about Duraipandi and his cohorts. He leads them to a van where the gang is gassed and knocked out, but a gunfight erupts: Judas dies after confessing, insisting that his own motive was friendship and gratitude because the Purushothaman doctor once saved his daughter’s life at Vellore CMC.
The mastermind circle reveals itself as a predatory racket: Thirisangu and Co. kidnap virgin girls, drug them, strip them, and force them into sexual abuse for money, with Suja as one of the victims. Charu is captured amid the chaos. Suja returns home three days later, but the trauma drives her to commit suicide the next morning. Grief and a thirst for vengeance propel the family to plot a revenge, faking their own deaths and kidnapping Britto and the peon Manikandan to extract confessions. Nagu, Moorthy, and Rajamanickam are seized, tortured, and harrowingly mutilated as the plan unfolds.
In the final showdown at the Palaniappan Mills, Nishanth is captured by the police, and Isakki Muthu is wounded. Purushothaman is shot, Annapoorni lunges forward to kill Isakki, and the couple—together with their remaining allies—fight back against the corrupt network, sacrificing themselves to save Charu. J.K. ends the principal threat by killing Thirisangu, bringing the criminal web to a violent close.
The verdict arrives in the courtroom as sentences are handed down: Duraipandi receives 13 years, and the others seven years each, with Britto and Manikandan given three years. Nishanth is sent abroad under a new identity, with Viktor Frankl’s Man’s Search for Meaning in hand, a symbolic charge to seek the meaning of his parents’ sacrifices. The victory is tempered by consequences: J.K.’s team is suspended for six months for letting a convict escape, and the city is left to reckon with the cost of truth, justice, and revenge.
