Murugan is an Indian scientist who has recently discovered how to store a part of the energy unleashed by lightning. He is assisted by Lilly who secretly spies for Bairavan. Murugan reports success of his research at a
Hong Kong scientists' conference. He subsequently announces that he will not reveal his discovery, since the world is on the brink of
World War III and his research may be used for destructive purposes. As scientists rebuke him Murugan decides to demonstrate. Murugan successfully demonstrates his experiment where a tree is shot down with a pill sized pellet and the surrounding is set ablaze, as a outcome of his research. Greedy Bairavan offers $100 million and persuades him to sell the research to a foreign country(
Deep State), which Murugan refuses. Despite the other scientists plea, Murugan burns the research papers in front of all scientists claiming that the research at this stage is destructive. Bairavan refuses to believe Murugan. Murugan then departs with his girlfriend, Vimala, for a world tour. He discloses to Vimala that he only pretended to destroy the research notes, and has actually kept them in a safe place. He indeed had plans to use them, to ensure that his research was used for productive purposes. Bairavan, who has been following them, overhears this and plans to loot the research notes to sell it to deep state agents. While in
Singapore, Bairavan shoots Murugan with a special gun that knocks him out. While Murugan falls from the tower
Ru Yun T'a into a swimming pool, vimala faints after witnessing the act. Sometime later, Raju, a CBCID officer and Murugan's younger brother from
Tamil Nadu,
India , arrives in Singapore in search of his brother. He finds Lilly who works in a club. They pair up and decide to find Murugan as his body was never recovered. On fine day, they meet a Markandeyan a waiter with
kleptomania who gives clues about meeting Murugan in the hotel where he works, a few days ago. They team up and try to meet Vimala to find answers. Bairavan tricks Vimala in to believing that Raju tried to kill Murugan who is now a amnesiac. Vimala leaves with Bairavan where she finds Murugan has been taken into Bairavan's custody. Raju, Markandeyan and Lilly get to know that research paper has been split into several parts and is in
Japan with a Buddhist monk. The address to reach the monk is in Vimala's locket. Before leaving, Lilly reveals that Ratna a friend of Vimala now has the locket. Ratna, a dancer in a hotel gets abused by her employer who forces her to striptease which she refuses. Raju fights and rescues her and pays her debts. She gets employed as his Personal secretary to repay Raju. Ratna's locket has address to reach another friend of Murugan named Robinson from Hong Kong in a time piece. Meanwhile Raju and Ratna fall in love and get married. While Bairavan's henchmen unsuccessful tries to steal the clock, Raju fends them off. The next piece of address is with Somsoy, a fruit vendor in floating market,
Bangkok,
Thailand. In
floating market, Raju, Markandeyan and Ratna gets chased by Bairavan's henchmen. Ratna suffers dizziness and upon doctor's insistence rests in hotel, Raju and Markandeyan finds Samsoy and his daughter Metta. Metta smitten by charms of Raju falls for him. Raju reveals he is married and consoles a disappointed Meeta that she is like a sister to him. Samsoy hands over a small statue that contains the next piece of address that directs to them to
Kyoto, Japan. Meanwhile, Bairavan attempts to assault Vimala as a shock treatment trail to . Murugan fights off Bairavan and secretly reveals to Vimala, that he is cured now. Bairavan who gets to know about the research notes, hires a martial artist to fetch it. Henchman now an imposter of Raju, learns the secret codes for the research notes are "Toshika, Kimoko, Mikayo, Nimona" but attacks and knocks down the monk. Raju arrives and find the henchman dressed up as the monk, who asks the meaning of these codes. Raju deciphers and get the case containing the research papers. Henchman attacks Raju but is unsuccessful. Lilly escapes Vimala and Murugan from Bairavan's custody and asks them to go to "
Expo 70" in
Osaka. Lilly reveals that she has a crush on Raju to Vimala and wishes to marry him. Vimala unaware of Raju's marriage to her best friend Ratna, promises that she will give her life to make Raju marry Lilly. Lilly also dials Raju and says she had managed to escape Murugan and Vimala to expo but gets caught by Bairavan. They all travel to Expo. In ensuing chaos, Murugan gets caught by Bairavan and the doctor an accomplice of Bairavan tortures Murugan with a new device. However, Raju manages to save Murugan while Bairavan and the doctor kill each other in crossfire. Finally all united, Raju is shown seemingly
marrying Lilly as well. Raju, Lilly and Ratna move to
East Africa on another expedition. ==Cast==