The film centres on a group of classmates who attendeded the same Chemistry class in their final year of college. Among them, Murali (Narain) is a singer and P. Sukumaran (Prithviraj) is a firebrand leader of the left-winged students union. Sukumaran’s rival, Satheesan (Jayasurya), leads the opposite faction of student politics and is aided by his sidekick, Valu Vasu (Vijeesh). Pius (Indrajith), a rich and spoiled brat of parents settled in the Gulf, is the campus Romeo and Sukumaran’s best friend. Thara Kurup (Kavya Madhavan) is the daughter of the Member of the state Legislative Assembly (MLA) from Muvattupuzha; she is a danseuse who regularly wins awards for the college with her performances.
It was Murali’s dream to have a ten-year reunion, but he mysteriously dies before the reunion can be organised. His parents, Professor Iyer (Balachandra Menon) and Lakshmi Teacher ( Shobha Mohan), both teachers at the college, decide to fulfil their departed son’s dream and bring his classmates together for a reunion. Sukumaran is now a diamond dealer based in Mumbai and is a divorcee. Satheesan is now an MLA, following his dreams to become a political leader, while Vasu continues to be his sidekick. Pius is now settled in the Middle East, while Thara, still unmarried, runs a dancing school.
The coming together of these classmates is the occasion for them to relive the past and to discover how Murali died. When all are together, Razia (Radhika) arrives. Sukumaran attempts suicide but it is later discovered that it was not a suicide attempt but a murder attempt. The suspense is revealed one by one. In the end, Thara and Sukumaran are reunited by their college love that was never accomplished.
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