Kavikkuyil is the story of Sivakumar and Sridevi who loves each other. Rajinikanth is the brother of Sridevi. He is loved by Jayalakshmi, but he does not reciprocate. The lovers, Sivakumar and Sridevi gets intimate and later Sivakumar face an accident on a stormy night and loses memory. Now the pregnant Sridevi is still waiting for Sivakumar. Will Rajinkanth approve his sister's relationship? Will Sivakumar regain his memory? Will Jayalakshmi win over Rajinikanth forms the climax.