Identity

In a flashback, Alisha Abdul Samad, a news presenter, is tipped off about Amar's crimes by Nakul and sneaks into Amar's warehouse to expose him. She is caught in a warehouse fire set by Haran and, though she escapes, is struck by a truck, which leaves her with prosopagnosia.

Amar Felix operates a network of blackmail schemes, secretly recording women and extorting money or favors. He runs these crimes from the abandoned clothing warehouse he owns, turning it into his base of operations.

A mysterious intruder enters the warehouse, kills Amar, and burns the building, destroying the evidence and his body. The killing ends Amar's criminal empire and triggers the police investigation.

Weeks after the murder, DYSP Dineshan is approached by Allen Jacob, who reveals there is an eyewitness named Ann with a photographic memory. They arrange a safe house for Ann in Dineshan's building to protect her identity.

Haran Shankar, a part-time karate instructor with OCD, lives with his sister Devika and half-sister Neerja. Allen asks him to sketch the killer from Ann's description, impressed by his drawing talent learned from his late mother.

Ann's initial description of the killer unexpectedly matches Haran's face, triggering Allen's suspicions that their guest might be the murderer.

At the crime scene, Haran makes a second portrait that yields a different face, which Ann confirms as the killer, raising tension and confusion among investigators.

It is revealed that Haran is the killer, but Haran attempts to break into Ann's house to confront her. His uncle Sudarshan intervenes, and Ann's memory issues surface as Allen arrives, addressing Ann as Alisha.

Haran explains that Amar had raped his sister Neerja and her friend Sakina, driving him to kill Amar. He had kept silent until Sakina's brother Ansar, blackmailed by Amar, sought his help, which led to further killings including Ansar's father, who was Ameer.

The next day, Allen disappears; Haran realizes the hard drive containing incriminating videos is his target. In a car chase, Allen steals Haran's disguise to approach Dineshan and ends up killing Dineshan to retrieve the drive, while Alisha wrongly blames Haran.

Two days later, Haran clears his name with Alisha and reveals Allen's true history: a suspended officer who exploited the Witness Protection Scheme to sell new identities to criminals, including Chinappa. He even arranged for Amar to force Ansar to help murder Chithrammal.

Allen holds Devika and Neerja hostage at Devika's hospital headquarters while investigators pursue Sudarshan. Haran is revealed to be a Sky Marshal and teams with Nakul and Alisha to locate seven other witnesses whose identities Allen sold.

On Chithrammal's flight, Haran, Nakul and Alisha uncover the witnesses and disrupt Allen's plan to crash the plane with a blackmailed air traffic controller. Haran disables the transponder to avert disaster, but Allen escapes and loses the hard drive when exposed to MRI radiation. In a final mid-air battle, Haran kills Allen and his guards, delivering justice.