| Director | Karthik Subbaraj |
|---|---|
| Genre | crime film |
| Country | India |
The film begins with Maha complaining to her boyfriend Malik about some men harassing her. The men pull up in front of them, causing Malik to fight them. The scene then switches to a man sitting in front of a girl who is unconscious in a room full of blood. The police then find the corpse of an 8-year-old girl in front of a building. Another girl is kidnapped and murdered, and her corpse is also discovered. Maha has a daughter, Aishu, whom she sends to school. A doctor suggests to ACP Vikram that the killer may possibly be a doctor, as he has erased all semen from the girl's body after raping her multiple times. Alex Pandian, a constable, assists Vikram with the case.
While Aishu is returning home, the school bus stops due to repairs. The bus conductor walks with Aishu to take her home, but halfway through, he has to go back, so Aishu walks the rest of the way by herself. Maha realises that Aishu is not home and enquires about her at the school. When Maha reaches the homes of the bus conductor and driver, they have absconded. Aishu has been kidnapped and is being held by the killer. Maha complains to Vikram about her missing daughter. While the killer distracts Maha by calling her and asking her to go somewhere, he enters her house to delete the CCTV footage. Maha then receives a phone call telling her to bring cash to a building.
One month later, Alex's granddaughter goes missing. Alex's daughter goes to a building with cash, only for the killer to take the money and attempt to escape. Vikram catches the killer and removes his mask, revealing Alex's face. The scene cuts back to Maha standing at the top of the building, looking down and smiling. The film then shows a flashback in which Maha and Malik are in love. Malik is a pilot who leaves for work just as Maha discovers she is pregnant. Maha eagerly waits to tell Malik the happy news. However, she learns that the plane Malik was flying has gone missing in the Arabian Sea. The scene then flashes back to Maha grieving over her daughter's death.
Maha enquires with the police about her daughter's case, but they chase her away. Maha decides to find the answers herself and bribes a policeman to give her all the case details. Through this, Maha realises that the CCTV footage taken from her house does not match the copy she has. Vikram questions Alex, who reveals that one day, while Vikram was investigating Maha's case, Alex found his son Matthew's car parked on the road and discovered Aishu in the boot. He calls Maha to tell her to go to the building, then takes Aishu with him and leaves her there. Aishu, not fully awake, walks over the edge and falls to her death. Alex did this because he did not want his son to get caught. Maha listens repeatedly to the recordings of the killer speaking to her. In the background of the recordings, she hears a mosque and a train. Maha goes to Matthew's shop to ask about nearby train tracks, not realising that Alex's granddaughter is inside. As Maha leaves, she hears the same sound from the recordings, along with a passing train. She discovers that Aishu's phone has been switched on and realises that Matthew is the killer. Matthew and Maha fight, during which Maha is severely injured but ultimately succeeds in killing Matthew just as Vikram arrives with the police force.