Thulasi (Saravanan), an orphan, works as a peon in an engineering college. He and the college professor Devi (Tharsha), who hails from a rich family, fall in love with each other and they get married secretly. However, their marriage is rejected by Devi's father (Nizhalgal Ravi), a powerful minister, and the two then go live in Chennai. Six years later, Thulasi and Devi don't have children thus Devi feels depressed about it. Thereafter, Devi becomes pregnant and gives birth to a baby boy but the doctor tells them that Devi's womb was damaged after childbirth and she cannot have another child. The years passed and they are now living happily with their seven-year-old son Kannan (Master Varun). Thulasi and Devi spoil Kannan, therefore, Kannan becomes an undisciplined kid. One day, Kannan bunks the classes and decides to spend his day outside. His school informs the couple that their kid had not shown up to school. Thulasi and Devi then desperately search for him. Meanwhile, some people take advantage of Kannan's innocence: Kannan is forced to beg by rowdies and he is even kidnapped by child traffickers. Kannan is then adopted by an old couple who have no children (Kottai Perumal and Pasi Sathya) and they take care of him. But as the days passed by, the police tell the parents that the chance to find their kid had decreased. In the meantime, the child traffickers kidnap him once again but Kannan manages to escape. A wounded and starving Kannan enters his house in the middle of the night and starts eating the food he has found in the kitchen. Thulasi and Devi are awakened by the noise and find their son in a pitiful state. The food eaten by Kannan was poisonous, the couple was so devastated after the loss of the child that they decided to commit suicide. The film ends with Kannan dying in the lap of his helpless parents.
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