Rajinikanth is a simpleton. His sister was killed by Thyagarajan, a smuggler. Rajini, by chance, reaches a martial art training school and learns the art of combat. He meets Radha, who falls in love with him. Assuming the name 'Paayum Puli', he tips the police about Thyagarajan. To catch Rajini, Thyagarajan abducts Radha. Will Rajini be able to free Radha? Will he avenge his sister's death?
