This is the one line story of 'Kaathavarayan.' They say it is sure to find favor with the PMK group.

Vidisha is an NCC student. When she goes to a town for camp, she sees that Kathavarayan (played by Karan) brews illicit arrack and lets it flow like a river. The arrack is being brewed in the village itself, so Vidisha informs the police and has Karan arrested.

Later Karan tells Vidisha why he got involved in brewing arrack. Anyone can predict the rest of the story.Vidisha falls in love with Karan!

Through a female student, the film shows the adverse effects of drinking, so the film makers expect that this theme will find great favor with the female population.

When Vidisha wears a white outfit and swims in the river, she herself looks like an intoxicating sight. And she is trying to abolish liquor? A good story!