Season 1

Dhoolpet celebrates Ayudha Pooja, and the police station gets alerted after news of a new ACP’s arrival. And a mysterious stranger with a gun checks into a lodge, while Constable Maasani gets intuitions on murders about to happen on the same night, the very next morning in the town, two young boys are found near a temple holding a head, which creates tension around Dhoolpet.

Chandra proudly surrenders her sons at the Dhoolpet Police Station for avenging their father’s death, creating tension when two politicians intervene. Soon after, a burnt head was found in the dump yard and that led the police dog straight to the lodge of the mysterious stranger. During interrogation, the officers discover that he is actually their newly appointed ACP Vetrimaaran. As he takes charge, a woman’s severed head unexpectedly falls from a fish laden tricycle after an accident, adding horror around the town. Vetrimaaran heads to the forensic lab and examines all three recovered heads.

A haunting past resurfaces as Vettrimaran confronts old scars, while a single piece of jewellery drags Sukumar into a mystery that reveals a missing girl’s terrifying truth.

ACP Maran interrogates Sukumar. Evidence is found both at Sukumar’s workplace and at his house. Maasani’s intuition says Sukumar is innocent, yet the forensic intelligence begins to suspect him.

Maadhangi, the lawyer who takes up Sukumar’s case, challenges Maran, saying she will confront him in court. ACP Arjun joins ACP Maran in handling the three murder cases.

Arjun and Maran split up their tasks. Maran begins his pursuit of two murder cases, while Arjun sets out to investigate one murder case.

Maran moves into the first floor of Maadhangi’s house. Arjun begins his investigation with Ratnam’s family. During the course of Arjun’s inquiry, Priya secretly follows him.

Displeased with Arjun’s way of investigation, Maasani decides to quit the job. However, when Arjun explains the truths he has uncovered in his investigation, Maasani develops respect and admiration for him.

Maran cleverly handles the harassment caused by Mathangi to make him vacate the house. Meanwhile, as Arjun conducts an investigation at Ratnam’s second wife, Kanchana’s house, an unexpected twist occurs.

Maran discovers that Mathangi is his childhood friend. Priya informs Arjun about the impending danger. Maasani begins to see mysterious illusions connected to the case.

On the way to the court, three mysterious men attempt to kill Inba Sekar, and Maran encounters and neutralizes them. Sukumar escapes from Arjun’s custody and goes missing. The Commissioner gives Maran and Arjun a three-day deadline.

Arjun strongly condemns Periyathambi’s attempts to tamper with the evidence. Maran shows intense determination to save the absconding Sukumar. The entire focus of the police turns towards Kanchana.

During the investigation, Kanchana reveals certain truths to Arjun. Sukumar decides to kill his friend Suruli. Maasani tells Arjun that she is a woman from the hills.

Suruli attacks Sukumar, who came to kill him, and manages to escape. Maran and Mathangi admit an unconscious Sukumar to the hospital. While interrogating Kulfi Ramesh, Arjun discovers who the real killer is.

Sukumaran regains his memory. Johnny sacrifices his life while planning to kill him. Umapathi gets caught in the trap set by Maran.

Umapathi confesses to killing his daughter Sandhya in the name of honor. Chandra finally breaks her silence.

Sukumaran falls into Sandhiya’s funeral pyre and takes his own life. Maran and Arjun team up to try and solve the third murder.

The story of Anand becoming Anandi. When the family says they will accept Anandi, Anandi refuses

Anandi’s husband seeks refuge with the police and gives a statement that Kailasam killed Anandi.

The mystery unravels and the truth about who killed Anandi comes to light.