Two cases, one involving a missing person and the victim of a hit and run, appear related. The police search for witnesses.

Durga used to be a promising cadet at the CBI but after a horrific car accident that killed her foster brother, Adithya, and caused her to lose her eyesight, her police career ended. She reveals to SI Manikandan at the police station that on the night of the hit-and-run case, she was picked up by a taxi cab driver. Durga believes the taxi driver may be the perpetrator of the crimes. Initially, Manikandan doesn't take her claims seriously because she is blind, but when Durga displays her acute senses, the detective starts to believe her.

Manikandan and Durga subsequently work together to find the cab driver, but all their leads turn up empty. Then, someone named Gowtham, comes forward. He is a motorcycle delivery boy who claims to have also witnessed the hit-and-run. Gowtham emphatically states that the car in question was not a taxi cab, but rather an imported sedan.

Later that night, when Gowtham is walking home alone, he is followed by Dr. James Dinah, a gynecologist who kidnaps and rapes young women. Gowtham tries to run but is struck by a brick. An ambulance arrives, and SI Manikandan and Durga drive to the scene. After being released, Gowtham sees Durga across the tracks at the Metro station, followed by James. He calls her phone and warns her about James. As he runs to catch up with her, she goes on FaceTime and shows him her location and surroundings. He guides her out of the Metro station and to safety. Durga reaches into her handbag and sprays James with pepper spray and runs off with Kanna, her seeing eye dog. James catches up with her in the elevator, however. He kills Kanna and injects Durga with a sedative.

When Durga comes to, Gowtham is with her. At home, she gets a call from an unknown number. The caller warns her away from the case. A few days later, SI Manikandan and Durga visit Renuka, a friend of Sofia, one of James's victims, who reveals that Sofia was pregnant and had decided to get an abortion. To catch the killer, Durga disguises herself as a pregnant woman seeking an abortion. She finds James's secret clinic and after a few turns of events, James ends up at the police station, whereupon he confesses to his crimes.

A fight ensues, in which Manikandan is killed and James escapes. Meanwhile, Gowtham and Durga are ambushed by the killer at an orphanage they are visiting. Gowtham fights James off while Durga runs to her car. The killer catches up to her, but she hits him on the head repeatedly, eventually killing him.

In the end, Durga has a new pair of eyes surgically implanted. At his remembrance ceremony, she reveals that they were donated to her by Manikandan.