The film begins with a politician being killed by a suicide bomber, who detonates her explosive belt. C. I. D. Shankar and his assistant Raju are deputed to the Nilgiris to investigate a case of mysterious murder. C. I. D. Ashokan also stays at the town, who poses as an herbal researcher, his close relation is lover's club dancer Reeta. Ashokan finds out the truth and he goes to Nagamalai estate, where he gives a lift to a young girl who explodes her belt. Ashokan gives a diary and a locker key to Vithya, who saves his life and admits him into the hospital. But unfortunately, Ashokan is killed by a mysterious gang in hospital. Vithya gives the things to Shankar and both fall in love. Raju falls in love with actress Rama, who also stays in the same hotel. Shankar meet Reeta and asks her to help him. She gives information to his assistant Raju and later on she is killed by the same mysterious gang. Vithya asks help from her brother Sundaram for the herbal details. Sundaram meets his friend Boopathy. Shankar was introduced to Boopathy by himself as an herbal researcher who gives the helpful information of the drug's details. Some particular herb grows at Nagamalai Estate inside the forest named the black forest, that herbal name was Arome and was produced into a drug. The drug was injected into the human body, who goes into hypnosis and that person is used for the gang's illegal works. Boopathy receives Shankar, Vithya and her brother Sundaram and they go into the forest. They realise Boopathy is also one of the mysterious gang and they meet thegang leader in their hidden secret place. Shankar discovers that the murders are being committed by a terrorist gang, who are embarking on a secret movement. Vidya and Sundaram question Boopathy about their organisation, whether it kills their friends, relatives and families. By hearing this, Boopathi changes his mind and rescues Vidya, Sundaram, Raju, Shankar and others. Will CID Shankar he able to accomplish his mission? Finally, Shankar is against gun fighting with the gang, and in this shooting, Boopathy dies and saves Vithya's life.
Cast
Cast according to the opening credits of the film ;Male Cast
Music was composed by Vedha and lyrics were written by Kannadasan.The song Andha Arayinale was composed by lifting two popular Hindi song Yeh Dil Na Hota Bechara and Dil Se Dil Milakar Dekho. Nanathalie Kannam song inspired by Jewel ThiefHindi movie song Dil Pukare Aa Re.
