Mahadevan (Mukesh), Govindan Kutty (Siddique), Appukuttan (Jagadish) and Thomas Kutty (Ashokan) are four young men who live in the housing colony named 'Harihar Nagar.' The movie starts with an incident that takes place in Bombay, where a murder takes place for the possession of a briefcase. In the next scene the four young men make appearance with their tricks to impress young girls. A girl, "Maya" (Geetha Vijayan), along with her grandparents relocate to Harihar Nagar and happen to be Mahadevan's new neighbors. The four try to impress her on many occasions. One day they find her her posting a letter. They bribe the postman and manage to get hold of that letter. On reading the contents of the letter, they come to know that Maya has come to Harihar Nagar to learn about the murder of her brother - Sethu Madhavan (Suresh Gopi).Maya visits the house of Andrews (Saikumar), a friend of Sethu Madhavan. She requests Andrew's mother - Ammachi (Kaviyoor Ponnamma) to contact her if she gets any information about her brother. The four men meet Ammachi as Sethu's friends. They manage to get Sethu's photo by telling that they want it for the colony's sports club. Maya gets this information from Ammachi and meets the four guys. She believes them to be Sethu's friends after seeing his photo at their house. The four cook up a story about a an affair Sethu had with a girl.Hearing the news that four are the friends of Sethu Madhavan, they are kidnapped by John Honai, who wants the briefcase shown in the beginning of the movie. Maya was in search of her brother's girlfriend and she finds details of Annie Philip (Rekha), who was close to her brother from the library. Annie is now a nun in a church and adopted the name Sister Josephine. Josephine narrates about her history with Sethu when questioned by Maya. Andrew's father was a businessman who was killed by John Honai's father and he built a business empire with the money taken from Andrew's father. Andrews creates trouble in that b