Dr. Murali Krishna loves Anuradha, but he loses his scholarship after a misunderstanding with her. Krishna becomes engaged to Lakshmi before going to London. An uninterested Lakshmi asks Anuradha to write letters to Krishna on her behalf, intensifying Anuradha's feelings. Then Krishna has an accident and everything changes.

Gundamma is a rich widow who dotes on her daughter Saroja but mistreats her stepdaughter Lakshmi. When brothers Anji and Raja encounter this family, they decide to teach the old woman a lesson.

The business partner and some employees of the elderly Mr. Somasundaram plot to eliminate him by hiding a bomb inside a doll. Learning of the plot, a few others try to avert the calamity. The story consists of the series of events by which the doll keeps changing hands, while being chased by those involved in the plot, and also by those trying to prevent it from exploding.