Justice T. Vasudev is murdered in his house, and after his death Coir is pushed into his mouth by the murderer. One of his close friends, businessman Kuwait Mani, seemed to be quite upset with this murder. Days later, Kuwait Mani is killed in an intentional car accident. After his death too, coir was inserted in the mouth. Police Superintendent Haridas Damodaran heads the investigation. He orders his sub-ordinate Joy to collect details of similar murder cases from history. It is found that Rosario Fernandes, who was found to have poisoned himself to death also had coir in his mouth. The police had not thought this significant, as it was something that a victim might do in his last moments after consuming poison. The investigation later reveals that all of the victims were college classmates, and the next target is expected to be Philip Thennalackal George, who is a businessman. Investigations lead them to suspect "Christy", who was the son of Rosario Fernandes and Sreedevi Rosario. Sreedevi had died bed-ridden owing to a disease. Haridas captures further information about Christy by meeting Sreedevi's father C. K. Gopala Menon, that he was behaving abnormally of late and now his whereabouts are unknown. From Nurse Leeladevi, it was also traced that Christy was present in mysterious circumstances when Sreedevi died in the hospital. On roughly questioning Philip, he reveals that they all had a longing for Sreedevi in their college days, but she didn't bother about them. When an opportunity came, they had gang raped her. During an event Haridas meets the chief guest Warrier who is a spiritual leader having devotees all around the world. Later, Warrier locked in someone in his house and called on Hari for help. Warrier claimed the stranger tried to kill him and an encounter between Hari and the stranger took place in which the stranger narrowly escapes. Police are able to trace and arrest Christy on murder charges, and he is returned to the mental asylum he had escaped from. While undergoing treatment there, Haridas transfers Christy to the police hospital citing better treatment and caring. Christy is subjected to Narcosynthesis, from it Haridas gets that Christy has been misled by someone, who is most likely responsible for the crimes. Later Christy escapes from this hospital which threats Haridas' job. Philip calls in the police for protection, but Haridas doesn't give him. Haridas and Joey watch Philip's home to catch the unknown culprit. It turns out that the perpetrator was Warrier, because during college time Sreedevi was initially his wife and the trio raped her in front of him. Aftermath he was under treatment for mental problems and set off for pilgrimage. When he came back to the city and settled, he saw everyone who hurt him was happy and nothing wrong has happened to them. So he set out himself to dish out justice.
