Sathyamoorthy (Prasanna), an orphan, vents his feelings in a poem but does not submit it to a magazine. Surprisingly, he reads a poem penned by a girl in a magazine that is quite similar to what he has written. He is amused and sets off to find the girl. He finds that she is a college student and living in Kutralam. He writes a letter and gets a reply. The friendship develops, and it gradually evolves into love.

One fine day, Sathyamoorthy goes to Kutralam to meet the girl and stays in his friend's house. The girl is away on a college tour. Ironically, she is the sister of his friend. In the second half, the friend dies in a mishap accidentally caused by Sathyamoorthy. Wishing to atone for his fault, he takes on his friend's responsibilities and considers his friend's sisters as his own sisters. When the girl comes back, she finds a new brother, who is supposed to be her lover. She is opposed to Sathyamoorthy since she thought it was totally his fault until she realizes why he has come to Kutralam. This is followed by an emotional resolution of their love.

The subplot follows Vadivelu as Udumban, whose antics are one of the highlights in the movie, especially the "Kenatha Kaanom" scene. A reference to the scene is made in the 2009 film Kanthaswamy.