Manu M.A., L.L.B., B.Tech. Electronics is researching in astronomy. Manu's father is a police officer. Lizzy plays the role of Manu's sister Uma. Ravunni, an exporter, is their family friend. Antony and Mary are neighbours of Manu. Their children are Dany aka Lother and Ikiru. Manu's elder sister 's children come from Delhi for their vacation. They are accompanied by Dany and Ikru which make up a four-member team headed by Dany. The children happen to visit the Art Museum on the very same time when Marthanda Varma's Crown is stolen. Ikiru noticed the robbers, Gomez, Appu and Kittu but was not able to describe them to his Grandpa. Manu, who has a well-equipped communication system, is able to listen to a conversation between Kittu and Gomez planning to loot Marthanda Varma's Sword. Manu informs his father about the plan, and they both rush to Padmanabhapuram Palace. Gomez, meanwhile already gets hold of the sword and while escaping the Palace encounters Manu and his father. A fight follows in which Manu is injured by Gomez; now Manu's father is in pursuit of the robbers alone. But the robbers kill Manu's father in a planned lorry accident. The viewers are just now able to figure out the mastermind behind the robbery is; Ravunni, the family friend. Unfortunately for him though, the incident was witnessed by Khader, a young orphan who happened to be in that lorry. The robbers plan to catch the boy and go after him. The boy manages to escape from them and in the process ends up meeting the four children, and tells them that their Grandpa was not dead in an accident but was killed. The curious children decide to investigate the murder. While intercepting a portable radio conversation between Gomez and Ravunni, the latter discloses his identity to Manu. Ravunni threatens Manu to stay away from his illegal export activities and warns Manu that, he will meet his father's fate. Ikiru who had already met Gomez drew his picture which is noticed by Manu and Ravunni. Ravunni gets shocked seeing the drawing and Manu decides to garner more information about Ravunni after watching his tensed face. Manu breaks into Ravunni's house and validates his doubts. The children meanwhile decide to venture to the gang's hideout as per the directions from Khader. They are shocked on realising that it was Ravunni leading the gang. The gang sees the children who crossed their fence and Ravunni directs his cronies to kill them. But, soon Manu reaches there and saves the children. The climax scene has a very funny fight scene which was enhanced by the funny Inspector role of Suresh Gopi as 'Minnal' Prathapan. The movie ends when the robber gang gets arrested by the police.
Cast
Mammootty as Manu, an aspiring scientist
Kuriyachan as Dany aka Lother
Anwar Hameed as Ikru
Anoop c parameswaran as Shanku
Sonia as Renu
Sandeep as Khader
Lizzy as Uma
M. G. Soman as DySP, Manu's father
Azeez as Antony, Dany's and Ikru's father
K. P. A. C. Lalitha as Mary, Dany's and Ikru's mother
Prathapachandran as Ravunni Menon, Manu's family friend
